当每个人都试图同时出售时，流动性就消失了。

The selfish gene theory is not a theory about selfishness in the everyday sense. It is a theory about the evolution of behavior.

The spread of liberal democracy and the integration of the world economy have created a situation in which the only legitimate form of government is one that is based on popular sovereignty and respects basic human rights.

We live among myths, and sometimes we don’t even realize it.

科学的进步不是一条直线，而是一个螺旋，总是在前进，又总是回到起点。

The historian must be a poet, not to create, but to recreate.

我们都因被爱而变得更好。