What faulty assumption does stalin make about the people

This false assumption that Stalin always thought about when people disagree and revolt against his plans are that he thinks Lenin is better than him. Lenin could be considered to be compassionate with the Soviet people while on the other hand, Stalin is a tyrant who exiles or executes people that doesn't agree with his policies.

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.