This is a very provocative theory, one that I cannot, in truth, readily discount or agree with. In a very small nutshell, there is a force Darwin is calling 'natural selection' that causes the spontaneous changes in an organism that help its survival to continue through its generations to become even more evolved and permanent parts of that organism, as long as they continue to help the organism thrive and survive. Seems like common sense, but Darwin cannot, of course, account for the reasons why or how these changes first occur. This book can be rather a dry read, but I am the most interested during passages where Darwin uses specific examples from his many field studies and research that illustrate his thoughts. Darwin believes most wholeheartedly in this theory and seems to have spent a large part of his life coming to his conclusions. There are even two chapters on dissenting views against his theory, which strengthen my view of him as being sincere and studied in his beliefs. Darwin basically believes that the Creator created a handful of different organisms in the beginning of our world, and the myriad amount of species today have evolved from these few sources. I don't believe this issue is as black and white as fish vs. fish with legs bumper stickers. The theory of evolution still has too many holes for my taste. I mean, if we are continuing to evolve, why is there still a WWE? And why is my boss dumber than me? Can you please explain that to me, Mr. Darwin?