1Loneliness
Every character on this ranch is starving for company. Crooks names it outright: 'A guy gets too lonely an' he gets sick.' Candy clings to his old dog because it's the only creature that talks to him, and when Carlson shoots it, his loneliness doubles—so he buys into the farm the same night. Curley's wife wanders the bunkhouse doorway looking for conversation her husband forbids, and the men avoid her because Curley will fight anyone who doesn't. Even George and Lennie's partnership exists because of loneliness: George admits that guys who work alone are the loneliest, and having Lennie keeps him from that. The town down the road is called Soledad—Spanish for solitude—and Steinbeck put it there on purpose.
Characters:George MiltonLennie SmallCandyCurleyCurley's wifeCrooksCarlson
2The dream of the farm
The little house, a couple of acres, a cow, some pigs, rabbits—George tells it so often it becomes a bedtime ritual, the story Lennie demands like a child. What's new is when it stops being a story: Candy's $350 makes it a plan with a date, one month out, and for a moment 'this thing they had never really believed in was coming true.' The dream is contagious—Crooks, who has watched a hundred men fail, asks to join for nothing but his keep. That's the point: the dream isn't really about land. It's about having a place where you belong and someone who can't fire you. And the book's answer is brutal—the closer it gets to real, the more dangerous it becomes.
Characters:George MiltonLennie SmallCandyCrooks
3Strength and weakness
Lennie is the strongest man on the ranch and the most helpless. His body can buck barley like a machine; his mind cannot predict what his hands will do. The same grip that makes him valuable kills a mouse, a puppy, and finally a woman. Steinbeck keeps pairing physical power with powerlessness: Candy's age and missing hand make him useless to the ranch even though he has money; Crooks's crooked back and skin lock him in the harness room; Curley's boxing skill loses to pure strength the moment he swings. In this world, being strong doesn't protect you, and being weak doesn't excuse you. Everyone is vulnerable to something, and the ranch exploits all of it.
Characters:Lennie SmallCandyCurleyCurley's wifeCrooks
4Mercy and killing
The book asks one question twice. First with Candy's dog: Carlson says the old, blind, stinking animal is suffering, and shoots it in the back of the head while Candy lies facing the wall. Candy later tells George he should have shot the dog himself—killing it should belong to the one who loved it. George listens. So when the mob rides out with Curley promising to shoot Lennie in the gut, George chooses the Luger and the back of the head. Slim's verdict—'You hadda, George. I swear you hadda'—is the book's own: sometimes love means being the one who pulls the trigger. Carlson's final confusion shows how few people can tell mercy from murder.
Characters:George MiltonLennie SmallCandyCurleySlimCarlson
5Predation
Watch what eats what. Lennie kills mice, then a puppy, then a woman—not from cruelty, but because the world is soft and he is not. Curley's wife threatens Crooks with a lynch rope the way a cat plays with something cornered. Curley hunts bigger men to prove something. And the book frames it all with a heron: in the opening chapter it stands in the shallows; in the last, it swallows a water snake while its tail waved frantically. The snake got too curious, the same way Lennie's softness and Curley's wife's loneliness got them killed. Steinbeck's world is beautiful and indifferent, and everything in it is either eating or being eaten.
Characters:Lennie SmallCurleyCurley's wifeCrooks