The lesson of this study is that, on the whole, having to deal with strangers teaches you to be polite to them, and that in order for such generosity to emerge, costly punishment of selfishness may be necessary.
Matt Ridley
The lesson of this study is that, on the whole, having to deal with strangers teaches you to be polite to them, and that in order for such generosity to emerge, costly punishment of selfishness may be necessary.