>>213817240For real.
Saruman is offered a chance to redeem himself. He refuses it, and is left to become a petty tyrant. Overthrown, he's offered a chance to redeem himself, refuses it again and gets killed by the servant he abuses. Evil destroying itself.
Grima wormtongue is offered a chance to redeem himself, he refuses it and sticks with Saruman, only to become poor crippled and abused by his boss. Evil destroys itself.
Sauron was offered the chance to redeem himself back in the First Age, come back to the fold so to speak, he refuses it and his shortsightedness - not even imagining someone wouldn't want the ring, like Sam who carries it for a bit - is his fatal mistake. Evil destroyed by greed, a capital sin.
The orcs? They could redeem themselves, in theory, if they gave up their violent and criminal ways. They don't want to. Evil destroys them.