Answer: This isn't really understood, because not all societies formed governments in the sense of western hierarchical systems, and not all governments formed under the same conditions. It is one of those mysteries, which means it was a gradual thing, and not a sudden seasonal change from anarchy to government. The first government accumulated within a group of people who spoke the same language, and there was some pressure on them that required some level of organization for the distribution of resources and labor, so it seems, but even as I write this I know that is far too simple.
For thousands of years it was believed there was a natural hegemony bestowed by divine power, then, there was the American Revolution and the idea of government was turned upside down. Following that was Karl Marx, who suggested that government was a mechanism of oppression to control the means of production and wealth accumulation, but all of the hypotheses built from this idea, which most of modern thinking can find some degree of lineage to, are problematic to be nice, and outright failures at the other extreme.
Quick answer is, there are a thousand answers, none of which have proven to be universal, so they are only partially right.
There is a lot of room for research in this area.
It means that you have to be willing to be with your friends despite the busy schedule and give time to spend with them.
a) This is because the other choices are either way too early or too late. Plus kids enter puberty around middle school.
The term that could be best described as the way that Kevin is thinking is a social comparison. Social comparison is being defined as a way of individual's determine his or her social worth in which could be based from how the person stack against other people in which we could see how Kevin felt better after finding out that Samantha was struggling more than him.