Let's do the research to try to fix the problems rather than changing the whole diet of the human race."

VOA: standard.2010.06.04

That's the history of the world; the whole human race has spent the bulk of its time farming.

那就是这个世界的历史事实,全人类花费了大量的时间,用在了农耕上

耶鲁公开课 - 古希腊历史简介课程节选