SAT essay!!! help

<p>I am currently preparing for the SAT essay and I am currently reviewing literary pieces and historical people and events: I would like to ask If my list encompasses most or all possible themes and If not what other things can I add and the themes missen? My list is as followed:
Alfred Nobel
Gandhi
WW II
The Great Depression
Barrack Obama
Nano Technology
Stem Cells
Soviet American Cold War ? Arms Race
Nelson Mandela
Gone with the Wind
1989
Civil Rights Movement
The Scarlet Letter
Machiavelli's the Prince
Animal Farm
Bill Gates</p>