In this talk, Ben Smith (Warwick) explores the origins of US 'war on drugs'. He locates this in a series of moral panics on either side of the Californian border between US and Mexico in the 1950s. These moral panics had a profound impact on US and Mexican politics, as well as the relationship between the two states. The talk is followed by a short comment from Jake Blanc (Edinburgh). This is a recording of an event hosted by the CSMCH in March 2019.