Is national defense excludable? Is it rival in consumption? How do we classify national defense in terms of the four types of goods?

National Defense

Represents the government's actions and policies aimed at protecting its country from external threats, typically involving military and defense strategies.

Excludable

A characteristic of a good or service that allows its owner to prevent others from using it without permission.

Rival In Consumption

A term indicating that the consumption of a good or service by one person diminishes the ability of another person to consume the same good or service.