Daniel Hale William openned the firat interracial staff hospital. He was the first one in performing an operation on a human heart. He succeded even when there were no blood transfusions, antibiotics or x-rays. He was able to change tactics if he saw that he needed to do that. For example, he was one of the first ones in using the catgun.
Answer:
As demographic changes began occurring, people became more aware of the importance of this new area as it was growing rapidly and natural resources were abundant.
Due to the new metal and iron, this area was now armed with weapons.
These groups eventually moved to southeastern Europe, the Aegean, the Mediterranean, and southwest Asia. These migrations took over the weaker populations such as the Egyptians and Minoans.
Natural changes like droughts and dust storms forced the Zhou people to settle on the edges and eventually they lost their dynasty.
