Where it’s a crime: Many muslim countries, Turkey, Tunisia, UK
Where its legal: legal in 58 countries, Himalayas, muslim-majority countries
Reason why the law varies:
Religion- the Qur‘an permits muslim men to take up to 4 wives. Mormon Church in the USA practiced polygamy until 1890
Tradition- Polygamy has been traditionally practiced in some african societies thought it has declined sharply in recent years.