I also read the book "On the Origin of Species" but people get weird about Darwin. He was actually talking about adaption when he said "stronger" and there are a ton of adaptive strategies in nature that don't have anything to do with brutality.
The financial industry especially gets retarded about Darwinism. They all run around claiming that only the strong should survive and then use that to justify lying, stealing, and other types of anti-social behaviors. The crazy thing is the ability of humans to work together is adaptive and allowed us to pretty much dominate the planet. If most humans spent their time trying to cheat everyone out of everything our culture would devolve into one long fight where the winner was all alone on the planet surrounded by death and destruction. You need time and infrastructure to create any type of tool more sophisticated than a club. If every individual was out trying to out kill everyone else, your species ends up looking more like what the sharks got than what the ants and bees got. Hell even sharks work together and hunt in packs.
Lying and stealing destroy trust and trust is essential for cooperation. With out cooperation a ceo would actually have to go on to the production floor and actually do something to make a product. With cooperation, they can sit in a desk somewhere and blow smoke up other people's asses and still make tons of money.
so I enjoyed Darwin's theory but man, it is so misused I wish he had died before writing it down.
To take it a step further, you could say that about religion too. People will take a concept, like evolution, or Christianity, or Islam, and adapt (prevert) the idea to fit their own individual world view, and no matter how much you try to point these people in the right direction, they only see the things they want to.
It's all the same. People can be giant dicks. They can read a book that tells them to "Love thy neighbor" and point to a few arcane lines to justify hating gays.