I tried readiing this book over 30 years ago and failed. I recently watched a documentary of Darwin's life and my curiosity was aroused again. I chose the first of the six editions. I am part way through and am impressed by the breadth of Darwin's thinking. I am in the process of writing a novel and there are themes in Origin of the Species that inform. Close members of a species being the toughest competitors like siblings in a family. I will make it to the end, but it will take me some time.