And all of this is because of cumulative cultural adaptation.

所有这些都是由于累积的文化适应。

And this cumulative cultural adaptation, as anthropologists call this accumulation of ideas, is responsible for everything around you in your bustling and teeming everyday life.

这种累积的文化适应，正如人类学家所称的，是思想的积累，与熙熙攘攘的日常生活中你周围的一切都有关。

For instance, the chairs you're sitting in today, the lights in this lecture hall, my microphone, the iPads and the smart phones that you carry around with you -- all are a result of cumulative cultural adaptation.

例如，你们今天坐的椅子，这个演讲厅的灯，我的麦克风，ipad和你们随身携带的智能手机——所有这些都是累积文化适应的结果。