The idea that we will make a society where literally everybody is graded, the good at the top, bad at the bottom, exactly done as it should be, is impossible. There are simply too many random factors: accidents, accidents of birth, accidents of things dropping on people's heads, illnesses, etc. We will never get to grade them, never get to grade people as they should.

The goal of economics is to understand how to allocate scarce resources in the most efficient way possible.

生活是一系列的选择，每个选择都有其后果。

"Memory is a tricky thing; it can be both a blessing and a curse."