"shot heard around the world"were the beginning battles of and

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.

Why are people in history willing to fight in conflicts against a more powerful oppressor?

Does increased security engender feelings of increased safety or does it increase the fears that people have?