What factors have led to the rapid changes in the sentencing structure in the US?

The rapid changes in the sentencing structure in the US can be attributed to several key factors, including growing concerns over mass incarceration, calls for criminal justice reform, and increased awareness of racial disparities in sentencing. Legislative initiatives such as the First Step Act have aimed to reduce mandatory minimums and provide alternatives to incarceration. Additionally, advocacy from civil rights organizations and shifting public opinion have pressured lawmakers to reevaluate punitive policies in favor of rehabilitation and restorative justice approaches. These changes reflect a broader movement toward more equitable and effective justice practices.