If a law is imposed the entire society, what does this mean

It means that anyone who lives where that law must be followed, is now under that law, also meaning that they have to abide by that law or consequences should be followed for their reckless/bad and ignorant behavior.

a true

explanation:

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.