研究明史需要全面理解其独特的社会结构和文化背景。

The story of human origins is still being written.

I write to find out what I think.

国家是理性的行为体，它们寻求最大化相对权力，以确保在竞争性的国际体系中生存。

That “democracy” is a somewhat vague term which I cannot define precisely. We ought to say, therefore: “I am fairly certain that it is a good thing if a government has something of the characteristics that are common to the British and American Constitutions,” or something of this sort.

在这个世界上，你无法选择是否受伤，但你可以选择由谁来伤害你。