Abstract: Current debates on politics and ecology in South America offer a number of lessons on the controversy concerning ecosocialism and degrowth. Some recent experiments on the South American left show a strong emphasis on socialism while deploying conventional developmentalism including decisive social and environmental impacts. In this dispute the different conceptions of value are very clear. Original perspectives on Buen Vivir as a radical critique of development point to alternatives that are at the same time post-capitalist and post-socialist, alternatives in which the recognition of the intrinsic value of the non-human is a core component.