Charles Ellicott Commentary Genesis 34:21

"These men are peaceable with us; therefore let them dwell in the land, and trade therein; for, behold, the land is large enough for them; let us take their daughters to us for wives, and let us give them our daughters." — Genesis 34:21 (ASV)

Let us take their daughters ... — In a young community, such as this of the Hivites at Shechem appears to have been, the addition of a large number of women was a valuable increase of their strength, and one that brought the promise also of future extension. Jacob’s men were also chiefly of the Semitic stock, and therefore possessed of high physical and mental endowments; and as they were rich in cattle and other wealth, their incorporation with the people of Shechem would raise it to a high rank among the petty states of Canaan. There was much plausibility, therefore, in Hamor’s proposal and arguments.