Morality is maintained through public opinion, traditional customs and people's inner beliefs, right?

Correct. Morality belongs to the category of superstructure and is a special social ideology. It is based on the evaluation criteria of good and evil, mainly relying on the sum of publicity and education, public opinion, traditional customs and inner beliefs, psychological awareness, principles and norms and behavioral activities. Morality, as a special form of social consciousness, is ultimately determined by the economic foundation and is a reflection of social and economic relations. First of all, the nature of social and economic relations determines the nature of various moral systems. Secondly, the interests shown by social and economic relations determine the basic principles and main norms of various morals. Thirdly, in a class society, social and economic relations are mainly manifested as class relations, so morality must also have class attributes. Finally, changes in social and economic relations will inevitably lead to changes in morality.