If you want to compete with other large groups of humans for limited resources, you need to band into a large group yourself, or be overtaken. That's always bee

If you want to compete with other large groups of humans for limited resources, you need to band into a large group yourself, or be overtaken. That's always been the case, and seems likely it will always continue to be the case. Also, there are certain nice things that we have that are only possible by working together. The national highways, for example. But at its core, the most basic necessity is the common defense.