Fire and Knowledge

Today about a billion billion insects are alive at any given time around the world. At nearest order of magnitude, this amounts to a trillion kilograms of living matter, somewhat more than the weight of humanity. Their species, most of which lack a scientific name, number into the millions. The human race is a newcomer dwelling among the six-legged masses, less than two million years old, with a tenuous grip on the planet. Insects can thrive without us, but we and most other land organisms would perish without them.

–Edward O. Wilson, The Diversity of Life (1992, Harvard University Press), p. 210-211