Human: Could you explain the theory of evolution to me? Assistant: 
The theory of evolution states that all species of organisms arise and develop through the natural selection of small, inherited variations that increase the individual's ability to compete, survive, and reproduce. This process of evolution is driven by two main forces: Natural selection and genetic drift. Natural selection is a process whereby traits that are favorable to an organism's survival and reproduction are more likely to be passed down to the next generation, while traits that are unfavorable are less likely to be passed down. Genetic drift is the random movement of genes within a population due to chance. Over time, these small variations accumulate and lead to populations that are better adapted to their environment.