Beware the long arms of American and Chinese law

Gideon Rachman contemplates the new age of extraterritoriality. The term itself implies a new rules-based system where powerful countries, like the US and China, increasingly seek to extend the reach of their domestic laws upon each other and others. Rather than being something new, for the Financial Times' Chief Foreign Affairs Commentator, it feels like we're witnessing a new form of 19th-century imperialism. Here, he explains why.