An internationally influential economic thinker, statistician and economist best known for his critique of Western economies and his proposals for human-scale, decentralized and appropriate technologies.

The 'intellectual father' of Ecological Economics and the steady state economy, and founder of the journal Ecological Economics.

Team member of MIT's Club of Rome, co-author of Limits to Growth, founder of the Sustainability Institute and co-founder of the Balaton Group.

Author, speaker, activist, educator, and co-founder of Transition Town Totnes and of the Transition Network.

Professor Emeritus at the University of Paris-Sud, the main intellectual force behind the popularization of the Décroissance (Degrowth) Movement, and author of 'Farewell to Growth'.

Professor of Sustainable Development, Economics Commissioner of UK Sustainable Development Commission, TED Speaker, and author of "Prosperity without Growth".

Environmental activist, philosopher, a major figure in the eco-feminist movement, author of over 20 books and other works critiquing the corporatization of the global food system.

Author, activist and environmentalist. Founder of the 350.org movement for addressing climate change.

Political and ideological leader, foregrounded non-violence activist tools and led campaigns for easing poverty, expanding women's rights, ending untouchability and increasing economic self-reliance.

Researcher, author, scientist, teacher and naturalist who, along with David Holmgren, is considered to be the 'father of permaculture'; founded The Permaculture Institute in Tasmania.

Human rights activist and former member of the National Council of Women of Kenya; initiated the Green Belt Movement.

Originator of the Ecological Footprint, past President of the Canadian Society for Ecological Economics, and a Fellow of both the Post-Carbon Institute and the One Earth Initiative.

Author and journalist known for his environmental and political activism; founder of The Land is Ours campaign and the Arrest Blair campaign.

Author, educator and speaker on peak oil, fossil fuel depletion, relocalization and resilience; a senior fellow of the Post Carbon Institute. Author of 'Powerdown', 'Peak Everything' and 'The End of Growth'.

An economist, educator, peace activist, systems scientist, and interdisciplinary philosopher; cofounder of General Systems Theory and founder of numerous ongoing intellectual projects in economics and social science.

Emeritus Professor of Systems Management of the Institute for Policy and Social Science Research at the University of New Hampshire, co-author of 'Limits to Growth', and co-founder of the Balaton Group.

Author and activist known for co-creating the permaculture concept and movement along with Bill Mollison.

President of the Global Footprint Network, and co-creator and developer of the Ecological Footprint, a measure of human demand on nature.

Biologist and educator, Bing Professor of Population Studies at Stanford University and president of Stanford's Center for Conservation Biology. Best known for his book 'The Population Bomb'.

Writer, conversationalist, activist and speaker; focused on sustainable agriculture, appropriate technologies, rural communities, interconnectedness of food production, the environment, community, and localism.

Author and filmmaker whose work has critiqued excessive and environmentally damaging consumerism; known for the online film 'The Story of Stuff', which has been viewed by millions of people in over 200 countries.

Best known for the documentary 'Living Without Money', an author, teacher and psychotherapist who has managed to step out of existing structures and find a new way of living. Founded Germany’s first exchange circle.

Clergyman, activist and Civil Rights leader who led the African-American Civil Rights movement, using nonviolent methods taught by Gandhi.

Economist, writer, advocate for local economies, co-founder of Yes! Magazine, and a former Harvard Business School Professor. Author of 'When Corporations Rule the World', and 'The Great Turning'.

Environmentalist and academic, active on both climate change and consumption issues. Author of 'Requiem for a Species', 'Affluenza', and 'Growth Fetish'.

19th century philosopher and political economist, author of 'Of the Stationary State' which recognised wealth beyond the material, and argued that unlimited growth would cause environmental destruction and reduced quality of life.

The spiritual and temporal leader of the Tibetan people who has consistently advocated policies of non-violence, even in the face of extreme aggression. First Nobel Laureate to be recognized for concern for global environmental problems.

Journalist and social activist known for her political analyses and criticism of corporate globalization; author of 'No Logo' and 'The Shock Doctrine'.

Sociologist who studies trends in working time and leisure, consumerism, work and family, women's issues and economic justice. Author of several books including 'Plenitude: The New Economics of True Wealth'.

Aka The Moneyless Man, a writer and activist best known for founding the online Freeconomy Community, and for living without money since November 2008. Author of 'The Moneyless Man: A Year of Freeconomic Living'.

Former scientist and Fortune 300 executive and creator of 'The Crash Course', a 20-chapter online video course that educates viewers on our broken economic system, the crisis of population demographics, and peak oil.

'Sharing lawyer', Co-Director of the Sustainable Economies Law Center and co-author of 'The Sharing Solution: How to Save Money, Simplify Your Life & Build Community'.

Author, filmmaker and national coordinator of Take Back Your Time, an organization challenging time poverty and overwork; author of 'What's The Economy For, Anyway?' and co-author of 'Affluenza: The All-Consuming Epidemic'.

Activist and President of Bolivia, advocate for social justice, leader of the Movement for Socialism party (MAS), which seeks to give more power to the country's indigenous and poor communities by means of land reforms.

Sociologist, activist and author of many works on women and globalisation including 'Ecofeminism', with Vandana Shiva, and 'The Subsistence Perspective: Beyond the Globalised Economy', with Veronika Bennholdt-Thomsen.

Economist who focuses on development alternatives that promote global equity and justice. Author of 'Human Scale Development' and 'From the Outside Looking In: Experiences in Barefoot Economics'.

Entrepreneur and founder of the sustainable business, White Dog Cafe, co-founder of the nationwide Business Alliance for Local Living Economies, international leader in the local living economies movement.

Developer of the 'conscientização' ('conscientization') social and educational concept of 'consciousness raising'; taught poor and illiterate members of Brazilian society to read at a time when literacy was a requirement for suffrage.

Architect, professor, environmentalist and advocate of complementary currencies. Author of 'Interest and Inflation-Free Money: Creating an Exchange Medium That Works For Everybody and Protects the Earth.'

Systems theorist, architect, engineer, author, designer, inventor, and futurist who coined the term 'Spaceship Earth' to describe the integral nature of the Earth as a living system.

Co-founder of the David Suzuki Foundation, award-winning scientist, environmentalist and broadcaster whose programs explain the complexities of the natural sciences in an easily understood way; author of over fifty books.

Co-founder of the Natural Resources Defense Council, founder and president of the World Resources Institute, law professor, author, vocal critic of growth models, and a proponent of more equitable and sustainable alternatives.

Political economist and one of the leading scholars in the study of common pool resources, whose Nobel Prize winning work demonstrated how common property could be successfully managed.

One of the founders of the emerging discipline of ecological economics and the first President of the Canadian Society for Ecological Economics. Author of 'Managing without Growth. Slower by Design, not Disaster'.

Political scientist whose work is concerned with feminist theory of society, patriarchy and technology, social movements, and ecofeminism; an activist against MAI (Multilateral Agreement in Investment).

Founded Open Source Ecology with the goal of creating the Global Village Construction Set, an open source DIY tool set of 50 different industrial machines necessary to create a small civilization with modern comforts.

Philosopher and pacifist who coined the term 'voluntary simplicity'; author of 'The Power of Non-Violence', and 'The Value of Voluntary Simplicity'.

Founder of the Integral Institute, his work integrates body, mind, soul, and Spirit with self, culture, and nature. Author of books including 'Boomeritis', a critique of postmodern culture and a call to move to a higher relationship to life.

Environmental analyst, founder of the Worldwatch Institute, and founder and president of the Earth Policy Institute. Author and co-author of more than 50 books including the Plan B series.

Politician, activist, and one of the founders of Die Grünen, the German Green Party; international political work and public speaking concentrated on peace, non-violence, ecology, feminism and human rights.

Environmentalist, social activist, and pioneer of the Chipko Movement, which used Gandhian methods of non-violent resistance to prevent the destruction of forests in India; known for his work on subaltern social ecology.

Physics Professor who argues overpopulation is humanity's greatest challenge; his 'Arithmetic, Population & Energy' lecture, which he has given 1,600+ times since Sept 1969, has over 4 million YouTube hits.

Director of the Institute for Sustainable Solutions (ISS) at Portland State University; co-founder and past-president of the International Society for Ecological Economics (ISEE); also known for his work on ecosystem services.

18th century scholar influential in political economy and demography; author of 'An Essay on the Principle of Population', which observed that population growth is eventually checked by famine and disease.

Social scientist, Director of the Institute of the Theory and Practice of Subsistence (ITPS) at Bielefeld, Germany; conducted research on peasant movements in Mexico fighting for ejido and/or common land ownership.

Writer, poet, educator and cartoonist most widely known for his children's books written under the pen names Dr. Seuss; author of The Lorax, which is focused on themes of environmentalism and anti-consumerism.

Farmer, Member of the European Parliament and activist against genetically modified crops; spokesman for Via Campesina, the international movement of small-scale farmers, peasants, indigenous peoples and migrants.

Eco-philosopher, scholar of general systems theory, deep ecology; advocate for anti-nuclear causes, peace, justice, and environmentalism. Creator of the Work That Reconnects, a framework for personal and social change.

Co-founder of several organizations that explore the roots of hunger, poverty and environmental crises, and emerging solutions; author of 'Diet for a Small Planet', considered the blueprint for eating with a small carbon footprint.

Social, indigenous and human rights activist; founder of 'Alternatives to Consumerism' network - to identify sustainable alternatives to the Western consumer model with different spiritual motivations.

Key figure in founding the World Social Forum, a parallel to the World Economic Forum, for those around the world who are working on alternatives to world domination by capital; pro-democracy and anti-corruption activist.

Journalist, politician and senior member of Yemen's Al-Islah political party; organizer and human rights activist who became the international public face of the 2011 Yemeni uprising, part of the Arab Spring.

President of the Center for the Advancement of the Steady State Economy; conservation biologist and author of 'Shoveling Fuel for a Runaway Train: Errant Economists, Shameful Spenders, and a Plan to Stop Them All'.

Economist, ecologist, campaigner and writer; co-founder of Ireland-based Feasta (the Foundation for the Economics of Sustainability); fellow of the Post Carbon Institute, author of 'The Growth Illusion' and 'The Ecology of Money'.

Writer, teacher and speaker focusing on themes of civilization, consciousness, money, and human cultural evolution. Author of 'The Ascent of Humanity' and 'Sacred Economics'.

Filmmaker, author and analyst of the impact of the global economy on cultures and agriculture worldwide, a pioneer of the localization movement; producer and co-director of 'The Economics of Happiness'.

Social innovator who writes, consults and speaks on the power of collaboration and sharing through current and emerging network technologies; author of 'What's Mine Is Yours: The Rise of Collaborative Consumption'.

Farmer, philosopher and proponent of no-till, no-herbicide farming methods traditional to many indigenous cultures, from which he created a method of farming referred to as ‘Natural Farming’ or ‘Do-Nothing Farming’.

Intellectual, Keynesian economist, known for his thinking on the influence of the market power of large corporations; author of 'The Affluent Society'.

Journalist, speaker, Slow Movement advocate; author of 'In Praise of Slowness: How A Worldwide Movement Is Challenging the Cult of Speed', 'Under Pressure: Rescuing Our Children from the Culture of Hyper-Parenting'.

Economist known for work on development economics, social choice theory and capability; contributions were influential in the development of United Nations Development Programme's Human Development Report.

Philosopher, abolitionist, naturalist, author of 'Walden', a reflection upon simple living in natural surroundings, and his essay 'Civil Disobedience', on individual resistance to government in moral opposition to an unjust state.

Economist who developed a biological approach to economic theory; author of 'The Entropy Law and the Economic Process', in which he claims an economy faces limits to growth.

Conservationist who was pivotal in advancing the global environmental movement; author of 'The Silent Spring', which highlighted the danger for environmental and human health from the use of chemicals and pesticides.

Scientist, researcher, policymaker, author and campaigner. President of the Australian Conservation Foundation and patron of Sustainable Population of Australia. Author of 'Bigger or Better? Australia's Population Debate.

Writer and internet blogger noted for his experiment, along with his family, in attempting to live a 'zero impact' lifestyle in New York City for one year; author of 'No Impact Man'.

Social justice, human rights and women's rights activist; founder of India's Self-Employed Women’s Association (SEWA), recognized as one of the world's most remarkable pioneers and entrepreneurs in grassroots development.

Founding editor and publisher of 'The Ecologist'; known for his outspoken views opposing industrial society and economic development, and support for the ways and values of traditional peoples.

Founder of anthroposophy, a philosophy which attempts to synthesize science and mysticism; Steiner's work inspired the Waldorf School movement.

Storyteller and keeper of native lore of the Wampanoag Nation of Massachusetts and ceremonial medicine man of the Assonet Band; writer, poet and author of eleven books, he is co-founder of the Tribal-Healing Council.

Founder of the Foundation for Peer-to-Peer Alternatives, which researches peer production/governance/property and the open/free, participatory, and commons-oriented modes of human cooperation.

Campaigner and policy maker who founded the climate change, energy and interdependence programmes at the new economics foundation; author of 'Ecological Debt: Global Warming and the Wealth of Nations'.

Leader of the Green Party of England and Wales, the Green Party's first and only Member of Parliament (MP) in the UK House of Commons; campaigns and writes on green economics, localisation and trade justice.

Ecological economist working to integrate social, human, and natural capital into the way the world views economics; Fellow of the Gund Institute for Ecological Economics and the Post Carbon Institute.

Founder of Ethical Markets Media, LLC, a world renowned futurist, evolutionary economist, and columnist; author of 'Ethical Markets: Growing the Green Economy'.

Civil, human and women's rights activist and campaigner; chaired the United Nations Commission on Human Rights, which drafted and approved the Universal Declaration of Human Rights.

President of the Board of the Transnational Institute; works concerns arious aspects of neoliberal globalisation and ideology; author of many books including 'The Debt Boomerang' and 'A Fate Worse Than Debt'.

Associate director and policy coordinator of the Center for Conservation Biology at Stanford University; co-author of several books on overpopulation and ecology with her husband, Stanford University professor Paul R. Ehrlich.

Historian, political economist, activist, writer and president of the National Center for Economic and Security Alternatives; author of critically acclaimed books on the atomic bomb and atomic diplomacy.

Pioneered studies of energy flows in ecosystems; argued that society faced similar energetic constraints. Introduced the concept of emergy, the amount of solar energy embodied in the products of the biosphere and society.

Author of 'The Real Wealth of Nations: Creating a Caring Economics' which proposes a new approach to economics that gives visibility and value to the most essential human work: the work of caring for people and planet.

Ann Pettifor is a fellow of the New Economics Foundation, London; best known for her leadership of a worldwide campaign to cancel approximately $100 billion of debts owed by 42 of the poorest countries – Jubilee 2000.

Researcher of social inequalities, best known for his book with Kate Pickett 'The Spirit Level', which claims that societies with more equal distribution of incomes have better health, fewer social problems and are more cohesive.

Natural sciences writer, innovation consultant, and author of 'Biomimicry: Innovation Inspired by Nature', an emerging discipline that seeks sustainable solutions by emulating nature's designs and processes.

Former President of Ireland, former United Nations High Commissioner for Human Rights, Honorary President of Oxfam International; established several international trade, social justice and human rights initiatives.

Trade union leader and environmentalist who fought to preserve the Amazon rainforest, and advocated for the human rights of Brazilian peasants and indigenous peoples.

Sustainable food and farming and local food economy advocate, formerly director of California’s Buy Fresh Buy Local campaign; author of 'Farmer Jane: Women Changing the Way We Eat'.

Economist and author of 'The Coal Question' in which he observed that improving energy efficiency typically reduced energy costs and thereby increased rather than decreased energy use, an effect now known as 'Jevon's paradox'.

Founder and director of Positive Money, an organisation promoting awareness of the fundamental problem of the current debt-based monetary system in the UK.