Ender's Game/Fridge

Fridge Brilliance
": I surprised you once, Ender Wiggin. Why didn't you destroy me immediately afterward? Just because I looked peaceful? Stupid. You have learned nothing. You have never had a teacher. Ender (angry) :  I have had too many teachers, how was I supposed to know you'd turn out to be a-  (whispering) :  An enemy, Ender Wiggin. I am your enemy, the first one you've ever had who was smarter than you. There is no teacher but the enemy. "
 * Ender's Game and the Ender's Shadow series take place in an Earth with very advanced military and space technology, but otherwise is identical to Earth (technology-wise, the political situation is different). At first I found it strange that a world could be so advanced in the areas of warfare and space travel, but otherwise be very similar to today's technology. Then I realized; the Buggers had attacked Earth and killed a lot of people, causing the first Bugger War, which lead to the second Bugger War. Earth has continuously been at war with an alien species that is a known threat, so of course they would put heavy funding into warfare and space travel so we could take the fight to their turf. With such a heavy focus on the Bugger Wars, technology on Earth would have stagnated until the threat was over. This is a believably realistic evolution of technology on an Earth attacked by an alien presence- Gneissisnice.
 * Also most of the new technology that earth has and even hyperspace (to an extent (the Ansible)) and especially The Little Doctor are all things military brass would very much like.
 * Science is just starting to find out that people are really, really good at games. (No, really. Give Science a break, she has a lot to work on.) Why is this important? In the future, they definitely will have learned that people learn best via play.
 * Earlier on, Petra tells that Ender that although the teachers gave an explanation for the artificial gravity system, it contains holes and contradictions. From the deceiving and untrustworthy behavior of the teachers, Petra prompted: "Our teachers are our enemies." Later, when Ender first encounters, it folds back onto itself, this time as, "Our enemies are our teachers!" 


 * It bothered me at first that Peter ended up this beloved Hegemon after being such a monster as a child. Yes, Ender admits that he probably saw Peter as worse that he really is, but we see directly how Peter acts. Making very specific threats about how you're going to get away with murdering your siblings is not normal behavior. Then I heard a theory that low-level symptoms of sociopathy, if combined with good self-control and high intelligence, can actually be very useful for successful business or political leaders. The ability to lay off thousands of workers or order soldiers into battle without hesitation or remorse can actually make a ruler much more effective. Once Peter learned self-control, his sociopathy is part of what made him a great leader.
 * *shudders*