What is McCulloch v. Maryland and how did it address federalism?

McCulloch v. Maryland is one of the first and most important Supreme Court cases on federal power. In this case, the Supreme Court held that Congress has implied powers derived from those listed in Article I, Section 8. The "Necessary and Proper" Clause gave Congress the power to establish a national bank. The case was a seminal moment in federalism: the formation of a balance between federal powers and state powers. Marshall also explained in the case that the Necessary and Proper Clause does not require all federal laws to be necessary and proper and that federal laws that are enacted directly pursuant to one of the express, enumerated powers granted by the Constitution does not need to comply with the Necessary and Proper Clause, which "purport[s] to enlarge, not to diminish the powers vested in the government. It purports to be an additional power, not a restriction on those already granted."