Verse 22. - Had reigned. The Hebrew word here used is quite a different one from that in vers. 8, 10, 12, 14, and elsewhere, where the reign of a king is designated. It means to exercise dominion, to be a chief or captain over a people. The use of it here suggests that though, as we read in ver. 6, the Canaanite men of Shechem and the house of Millo had made him their king, yet he was not made king by the tribes in general, only he exercised a kind of dominion over them, or over a sufficiently large portion of them to warrant their being called Israel.
9:22-29 Abimelech is seated in the throne his father refused. But how long does this glory last? Stay but three years, and see the bramble withered and burned. The prosperity of the wicked is short and fickle. The Shechemites are plagued by no other hand than Abimelech's. They raised him unjustly to the throne; they first feel the weight of his sceptre.
When Abimelech had reigned three years over Israel. The people in general consenting to what the men of Shechem had done, at least not opposing it, all being desirous of a king, and therefore put up with a mean person, rather than have none; though it is amazing they should, and that they had not rose up as one man against Abimelech, and avenged the blood of the sons of Gideon, who had been so useful and serviceable to them; it is indeed said that he reigned over all Israel, and his reign, such as it was, was very short, as is often the case with wicked princes.
Over Israel--i.e., over all the Israelites who would accept his authority--mainly the central tribes.