Defense & Security — item 18 of 20

Intelligence Services

Editorial judgment No institution publishes comparative data across countries — intelligence services are inherently non-transparent and structurally incomparable (classified budgets, no self-reporting to any international body). Included here on domain-knowledge judgment, not fabricated data.

Intelligence services sit 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, intelligence services has no institutional comparative tracker — this is one of only 2 items in Defense & Security that stay editorial judgment rather than institutionally sourced.

In this category

Intelligence services is 1 of 20 items in Defense & Security. See the full ranked list, or browse all 20 Human Endeavors categories.