Why does George take care of Lennie in Steinbeck's Of Mice and Men?

takes care
ofbecause he has promised Lennie's
Aunt Clara that he will look after him and protect him. This
promise and
George's moral astuteness bonds the men together. Lennie would not be able to

survive outside of an institution if George were not there to ensure his safety. George
views
his responsibility as a burden at times, but in certain moments
throughout the book one may see
his true affection for Lennie, particularly
through their mutual vision of a farm of their own.
This sadly unattainable
dream allows them to live outside of the stark reality of their lives.
George
views Lennie as a brother, friend, and partner in crime. Without Lennie, George would
be
lonely. It seems as though they need each other equally, although upon
first look it seems like
Lennie mostly needs George. This makes the ending of
the story all the more
tragic.