History
Comparative Federalism and the Division of Sovereignty
Quick fact
Federal systems show a huge variation: the US has 'dual federalism' with clear separation, while Germany practices 'cooperative federalism' where the federal government and states often share responsibilities and work together.
Why this is interesting
You've probably heard of federalism, but did you know that no two federal countries divide power the same way? Why does the US give its states so much power, while Germany coordinates more closely with its Länder?