Why did the congress and individual states pass preventative detention laws?

Congress and individual states passed preventative detention laws to address public safety concerns by allowing the detention of individuals deemed a threat to society, particularly in cases involving violent crimes or terrorism. These laws aimed to prevent potential harm before it occurred, balancing community safety with the rights of the accused. Advocates argued that such measures were necessary to protect citizens, while critics raised concerns about civil liberties and the potential for abuse in the justice system.