President Barack Obama insists that the United States defines itself by civic principles rather than by religious affiliation. In an otherwise unremarkable press conference in Turkey in 2009, he said: ‘[A]lthough… we have a very large Christian population, we do not consider ourselves a Christian nation or a Jewish nation or a Muslim nation; we consider ourselves a nation of citizens who are bound by ideals and a set of values.’ A torrent of conservative criticism followed, alleging that Obama had abandoned the country’s founding Judeo-Christian values. In recent months, most of the Republican candidates for their party’s nomination have called on the US to return to ‘the Judeo-Christian values that built this great nation’, as Senator Ted Cruz put it. Defenders of Judeo-Christianity believe that they are invoking timeless principles. In fact, Judeo-Christianity is a very recent invention.