The countries with the most slavery TODAY are all Muslim.

1. Mauritania
•Percentage Muslim: 100%
•Modern Slavery Issues: Despite legal prohibitions, hereditary slavery persists, particularly affecting certain ethnic groups. Enforcement of anti-slavery laws has been inconsistent.

2. Saudi Arabia
•Percentage Muslim: 100%
•Modern Slavery Issues: The kafala (sponsorship) system enablesconditions akin to modern slavery, especially among migrant workers. Reports include forced labor and human trafficking. 

3. Sudan
•Percentage Muslim: 97%
•Modern Slavery Issues: Human trafficking and forced labor are prevalent, exacerbated by ongoing conflicts and political instability. Both adults and children are subjected to various forms of exploitation.

4. Niger
•Percentage Muslim: 98.3%
•Modern Slavery Issues: Traditional forms of caste-based slavery persist in some communities, and individuals  born into slave castes face discrimination and coercion.

5. Uzbekistan
•Percentage Muslim: 96.5%
•Modern Slavery Issues: There are an estimated 1.2 million modern slaves, primarily in the cotton