I have examined and critiqued postmodernism elsewhere (see The Truth War, 2007). It should be sufficient for our purposes in this context to summarize the postmodern mind-set by describing it as dubiousness about practically everything. As we noted, the starting point for modernity was a rejection of biblical authority (setting aside belief in the supernatural as an untenable or merely irrelevant opinion). Instead, science and human reason were foolishly treated as reliable and authoritative. In the end, the disastrous failure of so many modern ideologies utterly debunked modern rationalism and delivered a deathblow to modern certitude. Postmodernism therefore subjects every idea and every authority to endless skepticism.
Modernity’s most basic assumption was that the way to achieve unshakable certainty is through a rigorous application of the scientific method. (Whatever could be tested and proved in the laboratory—or logically deduced from scientific “facts”—was deemed true; everything else was written off as mere superstition.) Moderns were convinced that a basic foundation of settled scientific knowledge would easily provide a trustworthy authority by which all truth claims could be tested. That process in turn would eventually bring about a uniform consensus regarding all the fundamental realities of life and human existence.