1. valley of the ashes- industry waste
2. wasted lives- Tom's affair, Daisy's affair destroys marriages and lives
3. Gatsby's illegal wealth and deception causes him to lose Daisy and to have no friends to mourn him
4. Jordan's cheating, lying, and carelessness causes her to lose Nick.
5. Drunkenness results in arguments, fights, chaos, tears, accidents, hurt, etc.
6. Daisy's lies and Tom's malice cause three deaths