He was observing some mocking birds on some island while coming back from england, where he attended university. Then he started Philosophizing evolution, which is how organism developed or adapted. He also thought they evolved by natural selection, which was that those organisms with the most beneficial traits are more likely to survive and reproduce.
umm.. Good luck.. I dunno if it helped u... I'm currently writing an essay for it. sorry for grammatical mistakes i made, though. :P
^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ThIS IS A DIFFERENT PERSON:^^^^^^^^^^^ 2 b honest this wasnt really helpful^ could your be more specific????^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^