Which form of money has value only because the government says it does?

Currency.

In reality, governments' currency has no value or worth. The only reason they were useful is because they were backed by natural resources such as agricultural plants and gold, silver, etc.

well this is going to be a long answer lol ok so the visigoths were a branch of the goths who frequently raided rome, uh the hunas attacked the guptas a lot and weakened them, uuhm of course the romans used math and science in there every day lives i mean they had a whole empire to run, and rome was split into east and west by a general named diocletian. hope this you! : )

jewish people, gypsies, and political opponents.