I'm not native speaker and I'm student learning English in Korea.
I saw one sentence that was from a exam but I found it really confusing.
One widely held view is that self-interest underlines all human interactions, that our constant goal is to maximize rewards and minimize costs
putting aside the meaning of the sentence, I can't understand why the author use comma instead of 'and' in this sentence. and I want to know if this is grammatically right or wrong. to put it simply, is it possible(Grammarly right) to use a comma instead of 'and'?
I'm struggling to know this about 3 hours.