Happenings are difficult to describe, in part because each one is unique and completely different from one another. One definition comes from Wardrip-Fruin and Montfort in "The New Media Reader", "The term 'Happening' has been used to describe many performances and events, organized by Allan Kaprow and others during the 1950s and 1960s, including a number of theatrical productions that were traditionally scripted and invited only limited audience interaction." Another definition is, "a purposefully composed form of theatre in which diverse alogical elements, including nonmatrixed performing, are organized in a compartmented structure". However, Canadian theatre critic and playwright Gary Botting, who himself had "constructed" several happenings, wrote in 1972: "Happenings abandoned the matrix of story and plot for the equally complex matrix of incident and event."