Utopia is not possible for the more reason that even in groups of largely similar ideological tenets, given human nature's desire to "Stand out" and or attempt to differentiate oneself and ultimately create a newer trend or stamp his identity beliefs turn into one upsmanship and governments turn on themselves and rebellions occur. All Utopian delusions such as experimentation with Marxist variants have failed and cost the lives of millions, due to a combination of formulas of ecomic naivete (redistribution of wealth, land redistribution, and massive bureaucracy) coupled with a homicidal autocrat means lots of people die and the experiment failed. I'd rather not try it the current system of state we have is bad enough