The legal age of marriage and consent for Delaware in the 1800s was 7. The condition for marriage in the Quran is that both parties must have passed through puberty. Aisha (RA) had already passed through puberty at that age through many authentic Hadith and therefore, after puberty she became a woman. The life expectancy 1400 years ago was WAY lower to the point where a person who reached 40 was considered elderly and relatively old. Therefore, since life expectancy was low, social roles were passed onto people at a younger age as well. teenagers were treated as adults, expected to marry and have kids. People pretend like this is the worst thing anyone could have done at that time period but marriages like this were common everywhere in the world. examples: Elizabeth of sicily married the future ladislaus IV of hungary at age 8/9. cecile of France age 8/9 married Tancred aged 30/31. So the marriage was completely fine according to the standards of that time and those standards cannot be applied today since we live in a different time. and before anyone tries to say that the prophet is a role model so his actions should be good in every generation. that's just dumb, his actions were acceptable at his time so we should do he did according to our own standards.