Human Rights are a set of rules that say that every person has some basic rights, like the right to speak freely, the right to worship as they like, or the right to get a fair trial if they are accused of doing something wrong.
The Soviet Union was a big country that existed a long time ago where these rules were often not respected. The government had a lot of control over people's lives and did not allow them to have some basic human rights.
For example, people did not have the right to speak their minds freely, which means they could not say what they wanted and express their opinions without getting into trouble. They also did not have the right to worship as they pleased, which means they could not choose their religion and had to follow the government's rules about it.
Additionally, people were often not given a fair trial, which means they were accused of doing something wrong without any real evidence and were punished without being able to defend themselves.
This lack of basic human rights made life very difficult for many people living in the Soviet Union at that time. Some people tried to speak out against it, but they often faced punishment for doing so.