How is George a "round" character in Steinbeck's Of Mice and Men?

George is a round character because he achieves a change
in the plot as it goes. In comparison to Lennie, for instance, he is able to realize
that he has hurt Lennie in the past and feels remorse for it. Although he has always
maintained the same line of duty as far as taking care of Lennie, he does undergo a
series of self-realizations and has been under the obligation of making severe choices
that will, eventually, change his life.

First, George had
to open up to the rest of the field hands against his will. He is a reserved and quiet
man, and he would have never done that if it weren't to help Lennie not make a fool of
himself. Second, George had to mold himself to circumstances instead of remaining flat:
This is when he begins to realize the burden of Lennie and the impossibility of his
dream. Finally, when he kills Lennie he knows that he is taking the risk of killing
everything he ever dreamed of, stood for, or wished for. Hence, George's roundness of
character is based on how destiny molds and changes him.