In the story, Of Mice and Men, the characters of Lennie and George are introduced in great detail. The author does this for several reasons, not only to make the reading more enjoyable and to draw the reader into the story, but to also make a social commentary on the American Dream.
Lennie is described as tall, gangly, uncoordinated, simple and childlike. He is socially and mentally delayed and he relies on his brother, George to enlighten him on normal day to day things. This would seem to signify that the American dream is similar in that it is often too large, or bigger than others, promises great things that it can't deliver, and ultimately causes disaster and suffering.
George is described as smaller, angry, disillusioned, a man of broken dreams. He is the voice of reality to Lennie's dreamer. In the end, it is this reality that has to take the life from the 'American Dream'.