A backward society is a society where things move or progress slowly - they don't keep up with the way that the rest of the world is progressing or changing. The moral basis of a backward society is the set of beliefs and ideas that guide the people in that society on how they should treat each other, how they should act and make decisions, and what is right and wrong. Basically, it’s the foundation of how people should behave, the things they should value, and how they should interact with each other. In a backward society, these beliefs might be outdated and not keep up with changing times, or they might be different than what people believe in other places.