Sartre's Ontology from Being and Nothingness to The Family Idiot.

I understand Sartre's ontology to develop in three stages: first, through Being and Nothingness and Saint Genet: Actor and Martyr; second, through the Critique of Dialectical Reason; and, finally, as it unfolds in The Family Idiot. Each stage depends upon the former and deepens the original ontology, while still introducing novel elements. For example, in Being and Nothingness, the in-itself, which is the source of our world-making, develops in the Critique into the practico-inert, which is the world made artifact, and in The Family Idiot, both the in-itself and the practico-inert unite to become the Spirit of the Age, joining our adventure with nature to that of our adventure with our family and our history. My reflection will be developed in four stages: first, a general overview; second, a more extended study of what Sartre calls the problematic of human reality; third, a brief reflection on Sartre's methodology; and finally, a concluding survey. [ABSTRACT FROM AUTHOR]