The ends of the spectrum change. It used to be that letting women vote was an extreme position, now we (in the US) may very well elect a female president in four years. It used to be that homosexuality was a crime, now not only is homosexuality in the open, we are getting used to same sex marriages.
I don't know what kind of viable opponents you would like... but I assume you agree that we should reach a point where we consider such issues as settled and move on. The process of moving on means we leave the few stragglers who stubbornly hold on to old ideas behind.