Charles Darwin 1809 - 1882 English naturalist. Proposed the theory of natural selection in evolution. Wrote famous " On Origin of Species". 5 year study voyage on the ship "Beagle". Honoured with burial at Westminster Abbey. Described as one of the most influential figures in human history.
Darwin’s first sketch of the tree of life from one origin. Note the cross-bars for extinction — and that change is not conceived with some direction-as-progress. And notice Darwin’s simple words introducing the sketch, “I think…”