The opinions expressed are his own.
Historians like to break up human progress into bite-sized pieces. It’s a useful technique: segregated and labelled, historical eras offer prisms through which to view the past, making it easier to comprehend. Typically, they’re bookmarked by inventions: the wheel, the steam engine, the atom bomb. Intellectual movements fit nicely, too: the Reformation, the Enlightenment, Modernism. Each innovation provides a paradigm shift, ushering in a way of thinking previously inconceivable but, after its emergence, unignorable.