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How would it be possible to make Europe develop more like China did, with one large empire controlling much of the mainland that keeps being successively resurrected every hundred years or so when it collapses?

Maybe if Alexander went west and conquered OTL Italy, Spain, France and Germany? He could do sort of what Qin Shi Huang did by imposing the Greek script and measurements on people who largely lacked both, opening the way for unity and a continued empire. Thoughts?
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