Which comes first, racism or the systemic need for racism?
In all the reams of printed and digital discussion about Donald Trump's (attempted) ban on Muslims from seven countries, the murder of six worshippers at a Quebec City mosque and Islamophobia in general, few commentators have mentioned the economic roots of racism.
But the truth is ideas have always been needed to justify treating other people badly in the competition for wealth and power. As long as there have been battles over resources people have objectified and demeaned the Other to provide ideological cover and to motivate their side to victory.