Researchers generally document the physiological changes, subjective experiences, and behavioral motivations associated with different emotions when investigating the intrapersonal functions of emotions, or how emotions help individuals navigate and respond to their settings.
Anger is associated with high excitement, emotions of rejection or unhappiness with some occurrence, and thus the motive to express anger or take measures against the source of dissatisfaction.
The First Amendment prohibits the Congress from making a law "respecting an establishment of religion, or prohibiting the free exercise thereof". This provision was later expanded to state and local governments, through the incorporation of the First Amendment.