神戸大学。

To write about human aggression is a difficult task because the term is used in so many different senses. Aggression is one of those words which everyone knows, but which are nevertheless hard to define. One difficulty is that there is no clear dividing line between those forms of aggression which we all deplore and those which we must not disown if we are to survive.

「ポレポレ」と「英文解釈の技術１００」の両方に採用されてる英文。