Common sense is often referred to as what most people believe to be the correct judgement or decision in a given situation. It is "common" since many would think that this decision will be picked by any normal person and that it's a simple choice that thinking otherwise is just plain stupid.
But we hear a lot of people saying that common sense nowadays are not that common. If you take time to digest that statement, you'll get constipated. How can we call something not common as common? And if most people think the opposite, would that become the new common sense?
The way our society is doing, we might only be seeing the product of what we perceive to be the "common sense". Or is it that we are just using it as an excuse not to think deeper and just do as what we think other people would?
Since we complain a lot about common sense being rare, it's high time for us to drop the idea of common sense itself. Let's quit being lazy and stop putting our high hopes in our decisions using plain old idea of what we think is being done by everyone else. Just think. It has never been that complicated.