Although there are differences in interpretation of the evidence, it is generally accepted that human biological evolution has not been a linear progression from one species to the next.
In fact, there are now thought to have been between 5 and 7 hominin genera, and at several points there have been 2 or more species and / or genera in existence at the same time.
Significant factors involved in the biological evolution of humans include:
- genetic drift
- natural selection
- cultural evolution.
Using selected named hominins, discuss how each of these three factors has contributed to the biological evolution of humans.