1) History is shaped by human biases and interpretations rather than objective facts. There is no single true interpretation of past events. 2) Scientists have determined that all humans alive today descended from a single group in Africa around 70,000 years ago, based on genetic evidence. However, different disciplines disagree on the exact timing of human origins and migration patterns. 3) Major catastrophes like meteor impacts, volcanic eruptions, and diseases have repeatedly changed human civilization and population sizes throughout history.

1. History, Science, and Trade Channing Shattuck