Albert Barnes on 1 Corinthians 15:26

The last enemy that shall be destroyed is death. The other foes of God should be subdued before the final resurrection. The enmity of the human heart should be subdued by the triumphs of the gospel. The sceptre of Satan should be broken and wrested from him. The false systems of religion that had tyrannized over men should be destroyed. The gospel should have spread everywhere, and the world be converted to God. And nothing should remain but to subdue or destroy death, and that would be by the resurrection. It would be,

(1.) because the resurrection would be a triumph over death, showing that there was one of greater power, and that the sceptre would be wrested from the hands of death.

(2.) Because death would cease to reign. No more would ever die. All that should be raised up would live for ever; and the effects of sin and rebellion in this world would be thus for ever ended, and the kingdom of God restored. Death is here personified as a tyrant, exercising despotic power over the human race; and he is to be subdued.

(b) "be destroyed is death" Hoss 13:14, 2Ti 1:10, Rev 20:14