So the Mohists wanted people to develop concern for others, more than just relationships. They also felt that society should establish uniform standards of altruistic (= helpful) behavior, so it would not just be dependent on relationships.
As usual, the Daoists were a bit different than the others when it came to discussing relationships.
Although Daoists favored harmony, they did not feel that it is necessary to subdue one’s individual interests for the sake of social harmony.
The Daoists felt that there could be diversity of opinions, as everything is ultimately subsumed within the Dao anyway.