Did you know the Netherlands became the first country to legalise same-sex marriage in 2000? And when it did the world went crazy.
Now look the state of play.
A little over a decade later, marriage equality has spread to four continents, with new debates raging in places once considered unthinkable. The historic vote by the Supreme Court to legalise same-sex marriage adds the United States to the increasingly crowded map of countries with full marriage equality.
Watch the video below to follow the incredible change as it has unfolded over the past 15 years.