But he has since shown precious little appetite for putting that principle into practice.

ECONOMIST: Israel and Palestine

"Because of that I must teach my child that this is so and put that principle into practice and when my child persistently does wrong then I must show pain will follow persistent disobedience, " he added.

BBC: Boy with placard

And then of course we saw that principle again put into practice by President Reagan and Prime Minister Thatcher on their respective sides of the Atlantic in the 1980s.

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