Pity our poor ancestors who, as Mobiot reports in the Guardian, were exposed to such unreasonable amounts of lead in paint and toys that entire generations turned to violence. Never mind their exposure to Arsenic in printing inks and pigments, Antimony in bath enamel, Mercury in both pure metallic and compound form, Uranium in table glassware and Cadmium in paint pigments. And if loading their bodies with accumulations of toxic heavy metals wasn't enough they faced surgery without anaesthetics, disease without prophylactics and pathogens without antibiotics.
Small wonder then than the poor dears went off and conquered a third of the globe, dominated its oceans, led the industrial revolution, set global scientific standards, built some of the finest engineering structures still known and cowed all but our biggest rivals with our ferocious battle ability. It wasn't our fault, honest, guv; it was chewing toy soldiers as kids what done it.