You might want to consider that that things like non-computability and so forth are relatively recent mathematical discoveries. At the beginning of the 20th century most educated people still believed in a Newtonian universe and the idea that everything was calculable, cf Russell &#38; Whitehead's <i>Principia Mathematica</i>. Einstein, Godel and others demonstrated that things were not so cut and dried, but even Einstein had difficulty with the random-seeming nature of quantum mechanics. The boundaries between linear and nonlinear behavior (in mathematical terms) remain somewhat obscure.<p>I suggest that it wasn't rampant intellectualism that caused the 20th century to be such an abbatoir, but the influence of industrial and technological change on the ancient human practice of warring with ones' enemies, combined with new technologies such as motion pictures and speedy photography which helped to make us more aware of the costs of war.<p>The US civil war was particularly bloody and gruesome, even though there was nothing resembling the 'scientific socialism' you decry; one might also point out that in the Viet Nam war, the opponents of communism had no problem with dropping napalm and various toxic defoliants all over a country to which they had no territorial claim in the first place and seemed perfectly willing to engineer the lives of others by force in the name of freedom.