One reason that national defence is a classic example of a public good is that

Question

Quizplus · Accepted Answer

A public good is defined as a good that is non-excludable, meaning that it is difficult to exclude individuals from using the good once it is provided, and non-rivalrous, meaning that one individual's use of the good does not diminish the quantity or quality of the good available to others. National defence fits both of these criteria as it is difficult to exclude individuals from benefiting from national defence once it is provided, and the act of providing national defence does not lead to diminishing returns in its effectiveness. Therefore, the benefits of national defence cannot be kept from those who do not pay, making it a classic example of a public good.

One Reason That National Defence Is a Classic Example of a Public