A handful of states have no age requirements at all for marriage. About 300,000 children have gotten married since 2000, according to Unchained at Last, an organization that fights for laws ...

Over the last couple of decades, childhood has stretched well past 18 — so it's no wonder the marriage age has, too. But some members of Gen Z are rebelling by wedding early.

Chen said China's legal marriage age should be lowered to 18 "to increase the fertility population base and unleash reproductive potential." It is to be consistent with international norms, Chen said.