When did adult suffrage start?

Adult suffrage began to gain traction in the late 19th and early 20th centuries, with many countries gradually extending voting rights to all adult citizens regardless of gender or property ownership. In the United States, the 19th Amendment, ratified in 1920, granted women the right to vote, marking a significant step towards universal suffrage. Other countries followed suit, with various reforms occurring throughout the 20th century. By the mid-20th century, many nations had established laws ensuring adult suffrage for all citizens.