Hi! I need help with essay. Artur Miller and Fidzgerald . Death of a salesman and The great Gatsby. Why author choose death for both protagonosts?

Hi! I need help with essay. Artur Miller and Fidzgerald . Death of a salesman and The great Gatsby. Why author choose death for both protagonosts? Whot he want to show through they death? And need help with thesis and tipic sentences. And professor want start with death , not American dream.Thank you.