Giants, known as Nephilim in Genesis 6:4, were mighty human leaders of great stature and influence, existing before and after the Flood. They perished in the Flood, except for genes carried through Ham's wife, leading to giants like the sons of Canaan and Anak. God destroyed many giants, including those in Ammon and King Og of Bashan, the last in Palestine east of Jordan. Goliath of Gath and his kin were slain by David and his men. Nephilim were violent, anti-God tyrants and bullies, dominating as leaders and trendsetters of wickedness, misleading humanity with their destructive teachings and influence, significantly impacting mankind both physically and philosophically. Also see sermons and articles about Giants.
Genesis 6:4 There were giants on the earth in those days, and also afterward, when the sons of God came in to the daughters of men and they bore children to them. Those were the mighty men who were of old, men of renown.
Numbers 13:33 There we saw the giants (the descendants of Anak came from the giants); and we were like grasshoppers in our own sight, and so we were in their sight.”