We never stopped being mass killers. And I doubt we ever will stop being mass killers. One direct consequence of say establishing a permanent colony on some other planet is that eventually we&#x27;ll have interplanetary war, it&#x27;s pretty much inevitable that such a colony would sooner or later decide to become autonomous rather than be ruled from earth.<p>The Dutch have the questionable honor of inventing mass murder (we once flooded a large area of land to drown many thousands of invaders) and we&#x27;re normally speaking pretty meek. There&#x27;s a killer in all of us and we exist in large numbers, some of us are more pre-disposed to killing than others and some of us are more than willing to follow orders, no matter how wrong. So, yes, we can and we probably will.<p>&gt; Hitler described humans as members of races doomed to eternal and bloody struggle among themselves for finite resources.<p>Hitler was self referential in that sense, he described himself and as long as we have &#x27;little Hitlers&#x27; walking around this will continue.