Question

which of these concepts developed by voltaire was included in the us constitution?
separation of powers
the social contract
the right to life and liberty
freedom of religion

Explanation:

Voltaire advocated for freedom of religion (tolerance of different religious beliefs). The US Constitution's First Amendment includes freedom of religion. Separation of powers is Montesquieu's concept, the social contract is Rousseau's, and "the right to life and liberty" is more associated with Locke. So the correct concept from Voltaire in the US Constitution is freedom of religion.

Answer:

freedom of religion