But on the side of the SDP and NSP (maybe, if it keeps on its present busy beaver path).
There is every reason to believe that these developments [states approving initiatives on gay-marriage and marijuana] reflect national trends in public opinion. And these national trends are driven in turn by the same general processes of social change behind the gradual liberalisation of values in Europe and around the globe. Ronald Inglehart, a political scientist at the University of Michigan, was first to document this process in detail. Mr Inglehart’s well-confirmed thesis is that, roughly, as societies become increasingly secure in material terms, each new generation is predictably less “materialistic”—less focused on merely economic concerns—and more concerned with equality, autonomy, and the injustice of arbitrary authority. If we take the long view, we can see the success of this cycle’s gay-marriage and marijuana initiatives due to the inexorability of death, which in time disposes of antiquated mores, and to the relentless liberalisation of cultural attitudes in well-functioning market democracies. Thus are the young ever the vanguard of progressive social change. And the young stayed away from Mr Romney in droves
Extract from an Economist blog. No link as the rest is very, very US centric