Great book. And for those religious folks who just write reviews without actually reading the text, there is no way to deny that our world works on basic principles that we can observe, which we do through science. If you actually read the beginning of the book, Darwin sets this up nicely with how humans for centuries have cultivated and bred animals as well as plants over the centuries. Dogs and cats are great examples, as well as the fruits we eat. We humans have helped our basic fruits we eat every day, the banana, apples, strawberries, etc be sweet, bigger, less seeds, ect. And that nature also does this of her own accord. We evolved, everything in the universe evolves. Just look out your window.