The juvenile court has moved through phases and evolved in numerous ways since originating in 1899. During the Progressive Era, the juvenile court was seen as a social welfare reform and began to establish youth institutions. The due process revolution followed, after a series of significant case decisions established due process rights and equal projection to children. The “Get Tough” phase of the juvenile justice system in the 1980s and 1990s targeted punitive sentencing, rather than rehabilitative sentencing. More recently, the juvenile court evolved to recognize the neurological and developmental differences between youth and adults. This rationale supports the need for a separate court from the adult criminal system, with the goal of early diversion and treatment for youth. Children are more amendable to treatment and rehabilitation, and they should be considered less responsible and less culpable as compared to adults. Children who commit crimes typically will be treated less punitively than adults who commit the same crime. Modern juvenile courts generally seek to address the specific needs of youth in a developmentally appropriate manner, while also maintaining public safety. Adolescence in itself exemplifies a phase of impulsivity, vulnerability, risky behavior, and the testing of boundaries. These aspects of adolescence are widely accepted today and better understood due to neuroscientific research on adolescent development. The multiple stages of the juvenile justice process involve a variety of decision-makers who have the power and discretion to determine a child’s future. The courtroom workgroup makes decisions to divert youth from the system, incarcerate juveniles in a placement facility, or mandate treatment programs. Other systems, such as child welfare, schools, families, and health, can be involved in the juvenile court process as well. In recent decades, juvenile courts have moved away from popular punitive approaches of the latter 20th century and toward more evidence-based rehabilitative strategies. Contemporary juvenile courts seek to serve the best interests of children and youth, but also the community and victims. Moreover, juvenile court jurisdiction, based on minimum and maximum ages and definitions of criminal responsibility, varies across states. Similarly, juvenile transfer laws vary from state to state, and jurisdictional boundaries are currently a popular area of reform. In the aftermath of decreasing juvenile crime rates, many states are considering systemic reforms to remove youth from adult prisons, minimize youth confinement, and reduce racial and ethnic disparities in sentencing.