This is How Fast America Changes Its Mind by Alex Tribou, Keith Collins

Looking at six big issues—interracial marriage, prohibition, women’s suffrage, abortion, same-sex marriage, and recreational marijuana — this visualisation shows how this has happened in the past: A few pioneer states get out front before the others, and then a key event—often a court decision or a grassroots campaign reaching maturity—triggers a rush of state activity that ultimately leads to a change in federal law.

@AlexTribou