It is about laws, principles and theories that are constantly expanding with experience and struggle. Today we live in a vastly different world than the one in which Marx, Engels and Lenin developed the basic principles, laws and concepts on which our science rests. While the basic laws and scientific principles do not change, their application must be expanded and enriched to keep up with the ever-changing times. Likewise, socialism is not the same in every country. There are no exact models of socialism in the world.
Every country arrives at socialism out of their own history, experiences, culture and traditions.
Our country was born out of rebellion and revolution. The American people would not accept the U.S. Constitution without a Bill of Rights because they didn't trust those in power. Today, it remains a living document that has changed and grown over a long period of time. The human and civil rights we cherish today are a reflection of the class struggle down through the years. The American people see the Bill of Rights as the foundation of democracy.