In the novel "Of Mice and Men," by John Steinbeck, loneliness appeared to be the main theme for the book. It changes how the person thinks and behaves. There are characters that suffer from loneliness, and Curley's wife, Crooks, Candy are the three of many. Loneliness affects the three characters by numerous ways, and the three key causes are because of their ability to work, their race, and their gender. Loneliness in Candy takes all his courage away and left him as an old-useless swamper. He has worked at the ranch for a majority of his life. But one day, while doing his job, he lost one of his hand in a farm accident. When his dog is about to get killed, Candy can't stand up to defence what he loves, because he doesn't have the courage, and out of all, he can't even stand up for himself. Candy regrets badly for what he had done to his only companion, the dog, by letting another man kills it instead. Without relatives, the dog is everything to him. Candy views himself as his dog. Old, with physical disabled, Candy believes he is an useless man. Candy is afraid when he's no longer useful, his boss will kick him out to the roadside, and treats him no different than his dog. The fear of getting lonely when he's older, when he has no more energy to work, the fear of having no one cares, no one pays attention to his existence because of his disability, it overwhelms him, and it slowly turns him into a person with no hope. When Lennie and George discuses about their future dream, Candy eagerly clutches to their idea as living together and sharing a home. He just wants to have somebody, and he would do anything to get that somebody, the one who can treat him with respect and caring. Loneliness in Crooks has made him a bitter -coloured man. He lives by himself because he is the only black man on the ranch. People around him treat him differently because they are racist. This is the reason why Crooks has no friends. He is desperately in nee