Far-right mass shootings are an increasingly international phenomenon. Although many killers act alone, they manifest similar ideologies through attacks that build on and take inspiration from one another. The Christchurch shooting in 2019 inspired the El Paso and Poway shooters, along with the Hanau shootings and the Norway mosque attack in 2020. And while the Denver shooter did not explicitly mention the perpetrators of those heinous attacks, his ideology bears many of the same characteristic traits.