LOL! Of course the traditional ameriKan ways is that only the fizicly and mentally fittest were allowed into the great murder-suicide machine. Moloch demands only the best and brightest young men!
The less intelligent are, on average, naturally more likely to die in war. However, in the case of the War of Northern Aggression, a lot of the more intelligent people of the South died than did the intelligent people of the North. College professors and such fought and died for the South, whereas in the North, that class avoided battle, and often military service altogether.
Confederate General Wade Hampton -- later governor of South Carolina -- said that the War for Southern Independence was a noble struggle for liberty and self-determination that cost the South "her best blood and all her treasure."
How about that. In Jew Jersey I had a compatriot who for some reason spent a lot of time in SC. He bitterly complained about encounters with its traffic cops and would spout -- getting other yankees doing so too -- "Southerners are so dumb because their best men got killed in the Civil War." I simply didn't know enuff yet to reply "Who killed them?"
When I escaped the cold northlands I (stop me if you've heard this one) didn't know which side wore blue and which gray in the war ;)
As you know, communists always seek to destroy and eliminate the middle class, as they're the class that poses the biggest threat to the Establishment. The rich all want a seat at the tyrants' table, and they have too much to lose, so they don't rock the boat. The poor struggle just eat, so even if they were smart enough, they don't have the time or the wherewithal to devise and carry out a state-threatening enterprise.
There's a big overlap between middle class and smart, ergo governments enjoy killing smart people. I believe it was David Irving who wrote that the USSR was extremely disadvantaged at the start of WW2 because the Bolsheviks had purged much of the top and middle military brass.
Mao had his heroes summarily execute in the street anybody who wore glasses. Kneel down, shot to the back of the head. The luckier ones got sent to work on the pig farms.