system
Given the following post, respond as if you're commenting on Reddit:
human
Why is it that existentialism has seemed to fallen out of favor within modern philosophical programs?

I have read many existial works in my time in undergrad, such as Camus, sartre, Heidegger, etc. And it seems like throughout my time that professors tend to look down or just flat out reject existentialism as a viable contemporary philosophical movement. Many of my professors say that it is the result of the horrors of WWII and seems like a philosophy for the young, and naive. Also they say it is very egocentric and is not viable. I was just wondering when such an interesting view fell out of the grace of contemporary philosophers and why?
gpt
First, it's important to note that existentialism was never much of a unified philosophical worldview or program. Heidegger denied Sartre's existentialism's lineage to his own philosophy in "Letter on 'Humanism'". Camus was critical of existentialism in general as committing "philosophical suicide." Sartre mostly gave up philosophy at the end of the 40's to focus on political activism.

However, probably most important to bring existentialism to a close was the following generation of continental philosophers who made rather strong attacks against existentialism from structuralist and Marxist perspectives, e.g. Marcuse, Foucault and others.