text1: What, rather than Islamism, requires explanation?
text2: Similarly, a writer for the International Crisis Group maintains that "the conception of 'political Islam'" is a creation of Americans to explain the Iranian Islamic Revolution and apolitical Islam was a historical fluke of the "short-lived era of the heyday of secular Arab nationalism between 1945 and 1970", and it is quietist/non-political Islam, not Islamism, that requires explanation.