Thebirthrateisloweredinquantitybythelackofhusbands，andloweredinqualitybothbythedestructionofsuperiorstock，andbythewidedisseminationofthosediseaseswhichinvariablyaccompanythewife—lessnessofthesegregatedmaleswhoaretoldofftoperformourmilitaryfunctions。
Theexternalhorrorsandwastesofwarfareweareallfamiliarwith;A。
Itarrestsindustryandallprogress。B。Itdestroysthefruitsofindustryandprogress。C。Itweakens，hurtsandkillsthecombatants。
D。Itlowersthestandardofthenon—combatants。Eventheconqueringnationisheavilyinjured;theconqueredsometimesexterminated，oratleastabsorbedbythevictor。
Thismasculineselectiveprocess，whenappliedtonations，doesnotproducethesameresultaswhenappliedtosingleopposinganimals。