可持续性不是一种选择，而是我们对后代的责任。

The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

"The truth is not always beautiful, but the lies are always ugly."

Causal inference is not just about statistical significance; it's about understanding the mechanisms behind the numbers.