There would be no sense of peoplehood, none of the untaught affections of those who are part of an organic social unit that shares the same destiny.

So it makes sense to keep your units engaged in combat as long as possible, pulling a unit back for repair/healing only when its overall health dips dangerously into the red zone.

While selling your manager on extreme programming — or anything else with extreme in the title — can be tough, selling principles like improved unit testing often makes more sense.