%0 Journal Article %T Homo sapiens, Homo demens e Homo degradandis: a psiqu¨º humana e a crise ambiental %A Ninis %A Alessandra Bortoni %A Bilibio %A Marco Aur¨¦lio %J Psicologia & Sociedade %D 2012 %I Associa??o Brasileira de Psicologia Social %R 10.1590/S0102-71822012000100006 %X this article discusses the environmental crisis through a dialogue between psychoanalysis, philosophy and the social sciences. it intends to introduce a common axis to the understanding of the relations between psyche and nature in a reflective text about human nature, its complexities and sociopathologies. the environmental crisis in which we are imbedded is approached through the followed propositions: (i) humanity has broken its links with its natural condition; (ii) humanity may be psychologically ill; (iii) humanity is not morally able to delegate the overcoming of the environmental crisis to the new generations because we live in a simulacrum associated with consumerism and alienation. we conclude that there is a subjective root in the environmental crisis, the analysis of which depends on finding the adequate answers to the civilization impasse that we currently face. %K sustainable development %K alienation %K sociopathy %K society of consumption %K simulacrum. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0102-71822012000100006&lng=en&nrm=iso&tlng=en