Based on what I have seen, common sense exists mainly in the sphere if the present, and what constituted common sense in the past may not be/seem relevant today. Or is it? In the past it may have made perfect sense to build a wall around one's city, but this does not make sense today. However, upon examination, the building of a wall around a city wasn't about the wall at all...it was about safety from threat....and, yes, that does still makes sense today w/ firewalls and passports and security checks and the like.
I find that, speaking from the perspective of religion, many of the same things are at work. An idea that originated as "common sense" at one time gets passed down and at some point seems archaic or medieval and is therefore dismissed as irrelevant. This happens a lot today as many people consider the concepts of religion an out-dated joke (and in many regards I don't blame them)!! However, upon revisiting the primitive origins of this old-school "common sense" it seems that the external manifestation are not really about what we may think. In it's origins, it was about something much more basic, profound, and important.....and timeless. Returning to the sources of inspiration and reexamining these in light of a world that has changed all too quickly actually yields fresh insights and direction. In the end, the action we thought of as outdated "common sense".....while outdated in some regards....turns out being about something deeper that is still very relevant. This illustrates a big gap in how religious thought is expressed today...these ideas seem so unrecognizable and irrelevant, yet they are really highly important!!!
Take the idea of sin. We all know how neurotic fretting over, avoiding, and feeling guilty over sin can be. In the end...is it worth it??? No....or so it seems. However, the basis for the concept were call "sin" is really based in the idea that certain actions diminish us as persons, blinds us, lessens our ability to be truly free, and cut us off from our true selves and even others. In other words....sin does not work and is a source of unhealth. So now the concept....once thought of as outdated and archaic (based on how we experienced the concept) now can carry fresh inspiration for leading a more full, complete life.
It's like being told as a child "do not cross the street w/o holding an adult's hand!!" Well in the end we find out as adults that yes, you can in fact cross the street...it's no problem. The real issue, though, wasn't that streets are inherently evil or that you are woefully incompetent to accomplish such a task. The real issue...it turns out...is that as a child you are small and cannot see oncoming cars, nor they you. As a result, you could be hurt badly....and this is what the whole thing was all about in the first place!!!!
So "what makes sense" can be reexamined and updated and explored....not just in our own lives but on a larger scale in light of our rapidly evolving human culture. It is a shame to discard the history of human wisdom/experience simply because it looks so different from the world we live in today. The basis, groundwork for this wisdom can still be extremely relevant!