translation.en: We've gone from people who confronted a concrete world and analyzed that world primarily in terms of how much it would benefit them to people who confront a very complex world, and it's a world where we've had to develop new mental habits, new habits of mind.
translation.zh: 我们已经从面对具象的世界 来分析如何 从中受益的人， 变成面对非常复杂的世界的人。 这个世界让我们需要有 新的心理习惯、 新的思维习惯。