Second reason why George killed Lennie is that George don't want Lenni to hurt anymore people because George knew that Lennie have no bad intentions Lennie was not aware of his own strength. Even Lennie didn't understand what he did the death of Curley's wife is very serious. It not like the mice or the puppy Curley's life cant just be replaced. Many people would find shocking because George killed his best friend Lennie. I think it was selfless the thought that life without Lennie would be easy might have crossed Georges mind but I think he kills Lennie mainly because he dont want Lennie to suffer from Curley. First reason why George killed Lennie is George wants to prevent Lennie from suffering a long and painful death“Shoot im in the guts” Curley wants to make sure that Lennie suffers a long and painful death for killing his wife but George kills Lennie before Curley kill Lennie in a painful way. Curley doesn't care about his wife all Curley wants is killing Lennie and getting revenge.
Second reason why George killed Lennie is that George don't want Lenni to hurt anymore people because George knew that Lennie have no bad intentions Lennie was not aware of his own strength. Even Lennie didn't understand what he did the death of Curley's wife is very serious. It not like the mice or the puppy Curley's