This lecture by the late RC Sproul gets to the root cause of current problems. Belief in relative truth has so damaged the minds of 90% of humanity that people are now literally insane. RC explains that in reality people DO believe in objective truth, that's why they get out of the way of a 20 ton truck bearing down on them. They just choose selectively to believe truth is relative when it suits their cause.

Highly recommended for anyone with a philosophical turn of mind, willing to grapple honestly with the question: what is truth,

What is Truth.