Among the 32 places surveyed, support for legal same-sex marriage is highest in Sweden, where 92% of adults favor it, and lowest in Nigeria, where only 2% back it.
The United Nations is hosting a summit on Sept. 19 to address the issue of refugees and migrants. Learn about European views of refugees through five charts.
Most people in the countries we surveyed – including 11 countries with significant Muslim populations – had negative views of the Islamic State extremist group as of spring.