Border & homeland security sits within Defense & Security, the sector protecting the conditions under which every other endeavor on this list can function at all — a category with a real, cited scale: $2,887B in world military expenditure, 2025 (SIPRI). Unlike 18 of the category's 20 items, border & homeland security has no institutional comparative tracker — IOM, UNODC, WCO, and INTERPOL were checked, but none publish public comparative country-level statistics for border security specifically — so it stays editorial judgment rather than institutionally sourced.
Border & homeland security is 1 of 20 items in Defense & Security. See the full ranked list, or browse all 20 Human Endeavors categories.