We are glorious accidents of an unpredictable process with no drive to complexity, not the expected results of evolutionary principles that yearn to … - Stephen Jay Gould

The skein of human continuity must often become this tenuous across the centuries (hanging by a thread, in the old cliché), but the circle remains unbroken if I can touch the ink of Lavoisier's own name, written by his own hand. A candle of light, nurtured by the oxygen of his greatest discovery, never burns out if we cherish the intellectual heritage of such unfractured filiation across the ages. We may also wish to contemplate the genuine physical thread of nucleic acid that ties each of us to the common bacterial ancestor of all living creatures, born on Lavoisier's ancienne terre more than 3.5 billion years ago—and never since disrupted, not for one moment, not for one generation. Such a legacy must be worth preserving from all the guillotines of our folly.

In other words, the theme of this book—“full house,” or they need to focus upon variation within entire systems, and not always upon abstract measures of average or central tendency—provided substantial solace in my time of greatest need. Let no one ever say that knowledge and learning are frivolous baubles of academic stability, and that only feelings can serve us in times of personal stress.

If Ediacara survivors had been able to evolve internal complexity later on, then the pathways from this radically different starting point would have produced a world worthy of science fiction at its best.