Multiplicity of interests protects the rights of citizens through having the Republican principle of representation. This is achieved through the constitution which establishes various branches of power and a bicameral legislature. This makes it harder for there to be a majority faction, ensures a multiplicity of factions, which will decrease the loyalty to factions.
The population policies in Sweden and China/India are very different. Sweden experiences a negative population growth, so because of this, Sweden encourages population growth. India and China are over-populated, which is a problem as there aren't enough resources for all people. because of this India and China discourage population growth.