Question

Some political theorists might argue that individual rights must, at times, be sacrificed to promote what?

Answer 1

For plato, the answer is the common good!

posting this for future users!

Answer 2

There are political theorist that might argue that individual rights need to be sacrificed in order to promote security and safety. This is the social contract, which emerged during the Enlightenment. Basically, you give up certain freedoms in order to have the state protect the rights you do have. 

This is an ongoing argument about how we balance certain freedoms and security.