What's common for some might not be so common for others. Some might think it's common to question and doubt, be skeptical and inquisitive, while others would consider that boring and they would find it more common to rely on feelings for that sense.

I think the best chance there is at bringing down the archaic cages, is to educate people. I think that ideas are contagious and once you've spread your affliction to a good saturation, people will have such a thing as "common sense", but I think we have to work on what is and what isn't common, however rudimentary it is.