At least 33 U.S. state prison systems and the majority of federal medium-, high- and maximum-security prisons have placed general population ("gen pop") adults under nondisciplinary lockdown at least once (but more often repeatedly or for a prolonged period) from 2016-2023. While most lockdowns are intermittent (lasting from a few days to several weeks), an increasing number of state and federal prisons keep prisoners locked down for most or even all of the year. In addition, many prisons make people suffer through constant lockdown "cycles," where prisoners get a very brief return to normal "gen pop" status before they are once again subject to several days or weeks of lockdown. Prisoners have no routines or any real rights whatsoever under lockdown. There is no guarantee of exercise, showers are irregular at best, and access to phone, email or visitation are nonexistent. Education, religious activities, rehabilitative programs, psychiatric intervention to crises, access to commissary ... are typically denied or are nearly impossible to get. Meetings with attorneys come to a halt or are hard to obtain. People under lockdown are often not even given basic hygiene materials such as soap or toothpaste. Modern prison lockdowns can ... be traced back to 2016, in a decidedly repressive, politicized reaction to nationwide prison strikes. Entire prisons were and are still punished for the relatively minor actions of a few, including ... something as simple as a shouting match.