“There is no such thing as tit for a tat in a civilisation with rule of law.” That’s not a general principle of which I’m aware. Plenty of countries have rules

“There is no such thing as tit for a tat in a civilisation with rule of law.” That’s not a general principle of which I’m aware. Plenty of countries have rules like “we treat you how you treat us”. Nothing about that is inherently incompatible with the rule of law.