Libertarianism. A political philosophy based on the idea that society would much improve if, like a teenage boy in his bedroom, it were just left alone for a while. Human nature would sort out the rest, with health care being supplied via charity and bankers, after another day of energetic market speculation, lifting their heads to say ‘I have earnt enough money now. I am going home to my family.’ Plus nobody would pay tax. Popular with teenage boys, gun-fearing Americans, and hipsters averse to reading the small print of Ron ‘The Groovy Grandpa’ Paul, a 77-year old libertarian Congressman, military isolationist, and sworn enemy of airport security. Not to be confused with libertinism, a philosophy of always having a glass of wine and sexual partner within easy reach.