That is a lie, and is absurd, you seem to be confusing marriage age data for the actual median age of marriage in the United States in history, versus people's impressions (including you), and the claims of the Mormon polygamy group that girls were married at an average age of 14 and 15 in the 1800s, when in reality the average age was much higher.
Not a lie when most of FR gave you family proof. And I sorta doubt that only FR posters had family history with young marriage in it. That thread went hundreds of posts and you were rebutted 8 ways to wednesday. Go ahead and spout it more. Your cred is already zero.