In contrast, international relations are lightly regulated. “The dilemma we face as we enter the 21st Century is that markets are striving to become global while the institutions needed to support them remain by and large national.” (Rodrik - quoted in The Economist, 29 September 2001, page 19 of 'A survey of globalisation').
Is this disparity in regulatory density reflecting some innate characteristic – that these relationships are, say, simpler – or does it reflect the greater difficulty of regulating across sovereign borders? It seems to me to be the latter, and we should address this deficiency.