Common sense is not so common. At least not in the sense that what we think are common sense behaviors are universal agreed upon across all of humanity.
An example: In a western culture, we tend to value the individual, so we think it common sense that we do things that benefit us. In an eastern culture, they tend to value the group, so they think it common sense that they do things that benefit the group.
We also are mired in groupthink that our tribes have the only correct values in humanity. So, the values of others occasionally cause conflict when members come into contact. A friend was upset about something neighbors did. One of the comments from someone sharing the friend’s values was that it is just common sense not to behave the way the people from another culture did. I wanted to reply that from the perspective of the other people, it is common sense to behave in this offensive way.
I did not because it was only going to make them defensive and cause unnecessary anger. People strongly defend their values. My questioning their values would be counterproductive. And having brown skin would lead to saying if I am not willing to share these values, then I should go home.
The funny thing? Best I can tell, all my ancestors going back 100 years were born in America. I just am introspective enough to try and understand how people work. And that leads me to consider other perspectives and give people some leeway. Given my Baha’I Faith upbringing, this consideration is just common sense.