How many people would it take for you to...

[Platypus]

probably one.

 

[raincityboy]

I'll use 9/11 as an example.
If you were on the plane, and knew what they were going to do, would you stop them even if that meant the plane would crash?

edit: nvm. bad example, you die either way.

 

[theeedude]

You don't need to die to save 100 people. There are children dying in Africa from all kinds of diseases which could be cured for well under $100.
"A single death is a tragedy, a million deaths is a statistic." -Joseph Stalin.