How will the world react when threatened by an alien force?
Orson Scott Card explores this idea in the story Enders Shadow by following the character Bean through his life in this militarized and science fictional world. When the Buggers invaded the world banded together. The common ideology became we are no longer many the many countries of Earth; rather we are the people of earth together. The best and brightest and strongest and fastest and smartest and so on we're to be sequestered in space. Learning how to fight, defeat, to end the buggers once and for all.
Bean grows up on the streets, he was trash to the military commanders and the testers for the program. He learnt to survive, using the incredible and unnatural intelligence he possesses. As he climbs the lader into the military and beyond he notices there is only one person who is like him. Ender. The one who is slated to lead them against the Buggers. As Ender and Bean become closer Bean will struggle with the questions.
When do I lead? When do I follow? Who do I choose to follow?