What is the meaning of the passage ”天下失道，而後仁義生焉……“?
民爭不分 doesn't mean 'people unified strive', it means 'people fight each other and not fulfill their duty
民爭 = 人民互相爭奪/人民互相爭執 (People fighting each other/ People quarrel with each other)
不分 = 不安分/ 不守本分 (not stay within one's bounds)
My understanding of this passage is when the social moral decay, individual benevolence will show itself -- it is not noticeable before because when everyone was moral, being moral was nothing special.
The following statements followed the same logic. When all people were decent, individual kindness was just a norm