With this philosophy text, Carse demonstrates a way of looking at actions in life as being a part of at least two types of what he describes as "games", finite and infinite. Both games are played within rules, as agreed upon by the participants; however, the meaning of the rules is different for the two types of games. The book stresses a non-serious (or "playful") view of life on the part of "players", referring to their choices as "moves", and societal constructs and mores as "rules" and "boundaries".
In short, a finite game is played with the purpose of winning (thus ending the game), while an infinite game is played with the purpose of continuing the play.