Chains such as these were used to stop slaves from escaping

Slavery is an economic system. In it, some people must work for no pay. It is also a system of ownership. In many countries slaves were owned by citizens of the country. These people were slaves.

There is evidence that even before there was writing, there was slavery. There have been different types of slavery, and they have been in almost all cultures and continents. Some societies had laws about slavery, or they had an economy that was built on it. During the 20th century almost all countries made laws forbidding slavery. The Universal Declaration of Human Rights says that slavery is wrong. Nevertheless, there are still different forms of slavery in some countries. view more...