Adam Clarke on Micah 4:1

But in the last days it shall come to pass - These four verses contain, says Bp. Newcome, a prophecy that was to be fulfilled by the coming of the Messiah, when the Gentiles were to be admitted into covenant with God, and the apostles were to preach the Gospel, beginning at Jerusalem, Luk 24:47; Act 2:14, etc., when Christ was to be the spiritual Judge and King of many people, was to convince many nations of their errors and vices, and was to found a religion which had the strongest tendency to promote peace. Bp. Lowth thinks that "Micah took this passage from Isaiah;" or the Spirit may have inspired both prophets with this prediction; or both may have copied some common original, the words of a prophet well known at that time. The variations (few and of little importance) may be seen in the notes on the parallel passages, Isa 2:2, etc.; to which the reader is requested to refer.