一种理论是，它们是由于人类的猎杀而灭绝的。

One theory is that they were hunted to extinction by humans.

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例如，一个移居的物种可能会因缺乏食物而灭绝。

A translocated species could die out from lack of food, for example.

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一些物种由于污染而灭绝了。

Some species died out because of pollution.

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The armed prophets conquer, the unarmed lose.

武装先知都会战胜而非武者终将灭绝。

耶鲁公开课 - 政治哲学导论课程节选