Privileges and Immunities Clause

The Privileges and Immunities Clause of Article IV, Section 2 of the Constitution states that "the citizens of each state shall be entitled to all privileges and immunities of citizens in the several states." This clause protects fundamental rights of individual citizens and restrains state efforts to discriminate against out-of-state citizens. However, the Privileges and Immunities Clause extends not to all commercial activity, but only to fundamental rights.