亲代投资是理解性别差异起源的关键。

History is alive in the stories we tell.

The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

The universe doesn't allow perfection.

There's a tendency to think that our present politicians are much worse than we had in the past.But we tend to forget how awful our politicians were in the past.