Ecomodernism is an environmental philosophy rooted in the belief that technological progress can allow humans to flourish while minimising our impacts on the environment, in particular by freeing up land for conservation by intensifying the production of food and other resources using technology. This explainer describes the values, goals, and practical solutions promoted by ecomodernists; what they would mean for land use and the food system; the history of the ideas that underlie ecomodernism; and the main contestations around the values and evidence underpinning ecomodernism.