Hi Nikita, if this happens our world may be called Utopia: an ideally perfect place, especially in its social, political, and moral aspects.
In Australian schools from the first grade to year 8 students study a subject called Civics and citizenship where they learn about rules of behaviour, laws and respecting the traditions and customs of other cultures. From years 9-12 this is covered in the novels they study as Australia is a multicultural nation.
If you want more info have a look at:
Civics and Citizenship