Explain John Locke's consent to be governed.

In his "Two Treatises on Government," John Locke described
how governments came into existence.  John Locke believed that people are born with
unlimited freedom to do what they would like to preserve their life, liberty and
property.  Without a government to protect people from each other, it would be nearly
impossible for people to live out their natural life, because each person could freely
use violence to protect their rights.  John Locke explains that government exists as a
contract between citizens living in a society together.  Each person gives up a bit of
their freedom (the freedom to hurt one another and to steal their property) to the
government, and in exchange for that power, the government provided the citizens with
protection from one another and from those living outside of the society.  Consent of
the governed is the citizens giving up their power to the government by promising to
follow the government's laws.