The Netherlands became the first country to legalize same-sex marriage in 2000, generating reactionary headlines around the world. A little over a decade later, marriage equality has spread to four continents, with new debates raging in places once considered unthinkable. Friday’s historic vote by the Supreme Court to legalize same-sex marriage adds the United States to the increasingly crowded map of countries with full marriage equality. Watch the video above to follow the incredible change as it has unfolded over the past 15 years.
Read more of Slate’s coverage of same-sex marriage at the Supreme Court.