This is hilarious.
Why on earth should anyone have to plough through the Renaissance before examining 'global' (you mean 'not white', I guess, because global is a strange word to use here otherwise) conceptual art?
The extent to which the latter reacts against the former can be explained in 500 words I should think. The movements immediately preceding conceptualism are useful to understand - but there's no sense in which conceptual art cannot be understood without a detailed grounding in Renaissance art.
So you must be saying that there is something intrinsic to 'the canon', and the Renaissance in particular ,that makes it more valuable than other forms of art (How do you know? Who decides? Have they seen All The Art?)
And that there's no possibility that our understanding what constitutes the canon is just as subject to ideology - plus fashion, taste, power, wealth - as anything else.
Or are you saying that things should be studied ONLY in descending order of value, as you perceive it? So Shakespeare first, and then eventually when you're about 30 you might be allowed to move on to Toni Morrison?
Or is it simply because it's older? Because I see you're not calling for everyone to study pre-Columbian art before they tackle Carl Andre.
So confused.
I'm the OH of a Renaissance art obsessive, an artist myself, and someone who is by no means uncritical of the current state of arts/humanities/fine art education and the contemporary art scene. I cannot imagine invoking 'the canon' uncritically - to hear you do so makes the rest of your argument not worth the candle imv.