You need to go further back than just 1500.
Western European thoughts on this were heavily influenced by the Ottoman and Byzantine empires.
Which were in turn based on the Roman empire.
Which were in turn based on the Classical Greeks, particularly those of Athens.
To exclusively blame western Europeans for this, when they were nearly wiped out by the Roman empire colonialism, is very short sighted.
But you arent doing that.
You cannot do that fairly without pointing out, for example, the brutal and vicious racism where the British compared the Irish and the Scottish to Apes and to be different, inferior races.