Based on analysis of sources like RAND, The Violence Project, Wikipedia, and global reports (defining as 4+ killed in public, excluding gang/domestic):
- US: ~55 incidents (2016-2026, e.g., Orlando 2016, Las Vegas 2017, Uvalde 2022).
- Other first-world countries combined (e.g., Canada, Australia, UK, Germany, Japan, NZ): ~11 (e.g., Munich 2016, Christchurch 2019, Nova Scotia 2020, Prague 2023).
US exceeds the combined total by about 5x. Numbers vary by exact definition.