I’m pretty sure it was taxes
The Constitution fixed the problems of the Articles of
Confederation by the following. Article I of the Constitution, Congress
can regulate interstate commerce. It is also responsible for coinage and
only Congress can regulate tariffs; in the early days of the national government,
it was largely funded through land sales, excise taxes, and tariffs.
Article II gave the national government a chief executive whose job it
was to execute the laws. He had veto power over Congress, but Congress
could override his veto or even vote to impeach him in extreme cases.
They actually played a pretty important role in early civilizations. For one, building a major urban civilization takes a lot of work. Slaves could be used for building projects to enlarge the city and its defenses, for agricultural labor to ensure that the people of the city could eat, or as domestic assistants to kings, lords, and shop-owners.
This kind of horrific...just a warning. Kids would be given dog tags as a sign of identification. At that time, the nuclear war was taking place. Parents would have their kids wear dog tags so that if they died, they would be able to identify the children's bodies.
When they started to establish factories in the cities