I think the rate of novelty is excellorating. It took us millions of years developing how to make sharp stone tools and millions of years to develope better ways to throw them and on to bows and arrows, how to make fire, brewing beer so it can save the world, read the stars, make cities, fight wars, form governments over vast land areas, all the while the rate of novelty(inventing new things) is increasing at steady rate between shorter and shorter times sequences in the time line of the species.
Today the rate of novelty has encreased so much that it is impossible to keep up where as years ago it would be so gradual to be hardly noticable I'm talking back before our grand parents.