One example of how contact between Native Americans and Europeans brought changes to Native American societies is with the introduction of the horse made the Native Americans more mobile as compared to their pre-Columbian lifestyle. For example, the Plains Indians now expanded their buffalo hunting since they could cover more territory. The Native Americans had very few beasts of burden like horses prior to European contact.
The author who proposed the theory of "natural selection," which other people called "survival of the fittest" was named Charles Darwin. These two ideas are the founding basis of the theory of evolution.
