What are the 6 main points of Darwin's theory?

Darwin claimed that groups or species if plants and animals developed as they struggled to exist, The ones that survived were the ones that were best suited to their environment. As environments changed over time, so the type of living things that could survive there changed. Some died out while new species evolved. Darwin believed that human beings evolved in the same way.

I know that this isn't 5 points, but you can put this into five points. I'm just to lazy to do so. :D