How did Charles Darwin explain the origin of man?

Charles Darwin explained human origins using evolutionary theory. That is, man came from another beast. This he did on the basis of observation and study of the anatomy of humans and primates. As it turned out later, Darwin was right. The modern scientific approach has proven the origin of humans and monkeys from a common ancestor. This is confirmed by anthropological findings and genetic analyzes. But evolution did not happen quickly. It took hundreds of thousands of years. Random mutations appeared in any animals, and only useful ones took root and were passed on.