Not so long ago, nobody met a partner online. Then, in the 1990s, came the first dating websites.
Match.com went live in 1995. A new wave of dating websites, such as OKCupid, emerged in the early 2000s. And the 2012 arrival of Tinder changed dating even further. Today, more than one-third of marriages start online.
Clearly, these sites have had a huge impact on dating behavior. But now the first evidence is emerging that their effect is much more profound.