This may have already been asked, but because WCKD wanted to save the human population but at the same time they are killing part of the population by sending in over 50 kids to the Glade and given 2 years to get out of the maze. But why would they kill the kids? they are trying to save humans so why kill them?
If the kids never fought in the Glade against the invading Grievers, and if the Gladers stayed, would they all have died? A bit of clarification would be nice thanks.