For this debate, “open borders” means eliminating all routine immigration barriers, including visas, work-permit quotas, skill or income tests, family caps, or entry fees that exclude people solely because they are non-citizens. Border officials may still conduct customs inspections, enforce public-health measures (e.g., quarantine or vaccination proof), and run narrowly targeted security checks on individuals listed as violent threats. Otherwise, anyone may freely enter, reside, work, and reunite with family in any country.