Among the following, who is most protective of individual rights?

The Peace of ________ treaty in 1648 ended the Thirty Years’ War and marked the beginning of the modern state system.

Fill in the blank(s) with the appropriate word(s).

When peace-loving nations band together to use their combined strength to punish aggressors, it is known as ________.

a. balance of power b. collective security c. preventive diplomacy d. mutual defense