Unfree labor refers to work that individuals are compelled to perform against their will, often under threat of punishment or coercion. This type of labor can take various forms, including slavery, forced labor, and human trafficking. Workers in these situations typically have little to no control over their working conditions or compensation. Historically, unfree labor has been a significant issue in many societies, with notable examples including the transatlantic slave trade and the exploitation of migrant workers. Organizations like the International Labour Organization work to combat unfree labor and promote fair labor practices worldwide.