Basics of Darwinism

Darwin describes evolution as the change of living things over time, and evolution is a result of natural selection. However, for natural selection to occur, four conditions must be met.

1. Variation in a population: some variations will allow organisms survivie and reproduce better than other organisms in the population.
2. Overproduction of Offspring: every population produces more offspring than can naturaly survive
3. Struggle to Survive: Indivivduals must struggle to meet their basic needs of survival
4. Differental Survival and Reproduction: the best adapted individuals tend to survive and reproduce, passing on their genes.

This means change happens over time in a population, not change happening in individuals during their lifetime.