What do you think was the single greatest accomplishment of Alexander and why?

Does he deserve the appellation of “Great?” Why or why not? Please reference: https://apus.realizeithome.com/RealizeitApp/ContentDelivery.aspx?Token=YjhAuJ3hQxlWk%2bzKhvWo7YtxCzvJ0IFPWlkqDjQSGITI2YNGENHtGTg5LgLBGVipjzf0i5x2kHBL%2fchbNCa75F18JM%2f3QhVrYFkLzolKuItLj88WmafOj9xleZvs3cqVtMa5EvbJZoo10TLzBXK%2f8P5LAu%2fNKDN%2bjZJcv7CBKeHkYLPni5PTDDTsjdpqbrphX2TMWpiwymgNryD1eWvny1o9OdyeSBILAVYfHCjRJeSDb%2bBDC1RVZ1CMaEISmk%2bLdyNF6gkWoJCuVE75u1444qJr0JepddE3d5P%2fCD0c9V1Fq3k0Q19aNR67xJF68ZWsfsQZIMaRRPfv7LlkP3uAHb7naofGcqOCgclQ0phC3DDOLR1mJqqeaXt9vanEBxyVfc5ga8Mh0GSlkN%2brPKKonHyQVAfJ%2bJIGDGib8X0a%2fMIjjBTh8%2fzqe5LO7xbq3KBjJ9ULbQ12EW5gCd3snZBQEA%3d%3d or provide two sources from JSTOR.