This page lists various categories of theoretical objections to open borders, or rather, to the moral theories that underlie these objections.

• Philosophical bases for anti-immigration arguments: Includes citizenism, territorialism, local inequality aversion, and nation as family.
• Objections to libertarian case: Includes killing versus letting die, citizenism, collective property rights, and anarcho-capitalist counterfactual.
• Restrictionist metaphors: Includes alien invasion metaphor and electing a new people.