Dear George

Dear George,
         I completely think what you did was the right thing.  If you hadn't done it Curley would have done it and let him suffer.  "Shoot for the guts.  That'll double 'im over." pg. 95  If you would have let Curley get to him he would have died slowly and painfully.
         Also since you killed him while he was thinking about the farm and rabbits you said you would get he died happy.  "Lennie giggled with happieness." pg 103  Rather than him died at the hands of an angry person who made him afraid, he died at the hands of someone who actually cared about him.  Also the way you shot him made him die instantly and painlessly, unlike if Curley of Slim shot him with the shotgun.