The formation of some utopian communities in the 1800s was an example of an interest in creating an ideal or perfect society.
a desire to improve people’s economic and social class.
an opposition to the practices of slavery and discrimination.
a growing interest in the education of young people.

an interest in creating an ideal or perfect society.

Explanation:

A utopian world is a world that is viewed as one without any problems, an ideal, perfect world. This is usually not realistic and used by people who fantasise.

Therefore, the formation of some utopian communities in the 1800s was an example of an interest in creating an ideal or perfect society.

"the royal proclamation of 1763"