The term "slavery" refers to a social and economic system in which individuals are treated as property, forced to work for their owners without pay or legal rights. Slaves were often taken from other countries through warfare, kidnapping, or trade, and brought to new lands against their will. They were typically denied basic human rights such as freedom of movement, the right to marry or have families, and protection under the law. The practice of slavery has existed in many cultures throughout history, but it was particularly prevalent in ancient Greece and Rome, as well as during the colonial period in North America and other parts of the world.