Usury
Usury (YOU-sure-ee) is when you lend money
to someone else and charge a percentage
as interest for that money. For instance if you lend me ten dollars,
and then I pay you back ten dollars next week, that's not usury. But
if you lend me ten dollars only if I agree to pay you back eleven dollars
next week, that's charging interest, and that's usury. But if I am not
allowed to get paid for it, why should I lend you money at all?

The first idea to charge interest seems to come from Bronze Age West Asia, and
people lending each other cows. If you let
somebody else take care of your cows for a year, in the spring when
he returns them there will be a lot of new baby calves, that were born
during that year. Who gets to keep those new calves, you or him? The
fair thing seems to be that you get some of the new calves, and he keeps
some. The new calves you take are your interest, and in fact the word
for interest in both Sumerian
and Greek is the same
as the word for "calf".
We know that people have been making loans at interest
at least since about 1800 BC, because the Babylonian
code of Hammurabi forbids charging too much interest. Probably around
600 BC, the Jewish books
of Exodus and Deuteronomy spoke out against charging excessive interest
to the poor.
In India, about 500 BC, both Hindus and Buddhists looked down on usury. Vashishtha, a Hindu lawmaker, made a law that nobody in the Brahman or Kshatriya castes could lend money at interest. And Buddhist writings from this time say that nobody can hope to escape the Wheel of Life if he or she lends money at interest. But it's hard to keep people from lending and borrowing money. By the 200s AD, the Indians had begun to say that usury was only wrong if the rates were very high.
During the Roman Empire, and in Han China, most people didn't worry too much about usury except to try to control the rates. But after the fall of Rome people did less trading and usury became unpopular all over West Asia and Europe. In the Islamic empire, usury was forbidden. The Koran said:
Believers, do not live on usury, doubling your wealth
many times over. [The 'Imrans 3:130]
and
Those that live in usury shall rise up before God like men whom Satan has demented by his touch; for they claim that trading is no different from usury."[The Cow 2:275]
So most Muslims would not lend money at interest. But people still needed to borrow money, so by the 1300s the Islamic Empire had developed a system where banks became partners in enterprises rather than just lending them money.
Bankers in Genoa, Italy (De Septem Vitis, from the 1300s)
In the Middle Ages in Europe, in the time of Charlemagne, the Church also said that usury was a sin, and you couldn't go to Heaven if you lent money out at interest. So Christians mostly didn't do it, and instead when people wanted to borrow money they went (ironically enough) to the Jews.
To find out more about usury, check out these books from Amazon.com or from your local library:
Eyewitness: Money, by Joe Cribb (2000). Not the best in the series,but still a good introduction to exchange systems for kids.
An Annotated Bibliography on the History of Usury and Interest from the Earliest Times Through the Eighteenth Century, by John Houkes (2004). Lists other books about usury, and explains what they're about.
Teachings on Usury in Judaism, Christianity and Islam, by Susan Buckley (2000)





