The best answer I've ever heard was...
One on one warriors almost always to kill soldiers.
In groups, soldiers almost always kill warriors.
I believe this was established by Julius Ceasar during the Gaul Campaigns.
Time wasted having fun is not time wasted - Lennon
(John, not the other one.)
"Yet across the gulf of space, minds that are to our minds as ours are to those of the beasts that perish, intellects vast and cool and unsympathetic, regarded this Earth with envious eyes, and slowly and surely drew their plans against us."