While America's highest office — the presidency — remains elusive to women, Finland has just elected its third female premier. Even more impressive, 34-year-old Sanna Marin, who was sworn into office on December 10, 2019, is the youngest prime minister in Finland's history, and the world's youngest sitting government head. Prior to this, that honor belonged to New Zealand's Jacinda Ardern, who was 37 years old when she took office in October 2017.