Question

What is an agreement among people or nations to unite for a common cause?

Answer 1

social contract. a voluntary agreement among the people to unite as a political community.

Step-by-step explanation:

Answer 2

An alliance.

Step-by-step explanation:

An alliance is an agreement among people or nations to unite for a common cause.

For example, the United Nations. The United Nations is an alliance organization comprised of countries that unite for a common cause of promoting international peace.