René Girard I See Satan Fall Like Lightning
Even if the mimetic nature of human desire is responsible for most of the violent acts that distress us, we should not conclude that mimetic desire is bad in itself. If our desires were not mimetic, they would be forever fixed on predetermined objects; they would be a particular form of instinct. Human beings could no more change their desire than cows their appetite for grass. Without mimetic desire there would be neither freedom nor humanity. Mimetic desire is intrinsically good.
Humankind is that creature who lost a part of its animal instinct in order to gain access to "desire," as it is called. Once their natural needs are satisfied, humans desire intensely, but they don't know exactly what they desire, for no instinct guides them. We do not each have our own desire, one really our own. The essence of desire is to have no essential goal. Truly to desire, we must have recourse to people about us; we have to borrow their desires.
This borrowing occurs quite often without either the loaner or the borrower being aware of it. It is not only desire that one borrows from those whom one takes for models; it is a mass of behaviors, attitudes, things learned, prejudices, preferences, etc. And at the heart of these things the loan that places us most deeply into debt -- the other's desire -- occurs often unawares. p 15