Lectures escartes is history. That's the conclusion of postmodernity.
Foundational truth is out, relativity is in.
Trace it to Hiroshima, the assassination of John F. Kennedy, the Challenger explosion. Technology is not the panacea we thought it would be. Trace it to Watergate, liposuction, spin doctors. Truth is not an objective reality anymore. Choice can paralyze as well as liberate.