José Ortega y Gasset decide and create a "project of life"—thus not be like those who live a conventional life of customs and given structures who prefer an unconcerned and imperturbable life because they are afraid of the duty of choosing a project. With a philosophical system that centered around life, Ortega y Gasset also stepped out of Descartes' "cogito ergo sum" and asserted "I live therefore I think". This stood at the root of his Kantian-inspired perspectivism, which he developed by adding a non-relativistic character in which absolute truth does exist and would be obtained by the sum of all perspectives of all
Cogito and the History of Madness translation of the text into English as "Madness and Civilization". The abridged 1964 edition removed the pages concerning Descartes on which Derrida had explicitly based his argument in "Cogito and the History of Madness." These pages on Descartes were only made available in English with Jean Khalfa's 2006 translation of Foucault's work on madness. Derrida makes an allusion to the master–slave dialectic in Hegel's "Phenomenology of Spirit" in the opening pages of "Cogito and the History of Madness." Foucault writes at the start of the second chapter of the "History of Madness" of a strange violent event that silenced madness