Government cannot establish a state church, pressure citizens to practice religion, or discriminate among religious  groups. To comply with the Establishment Clause a law must: 1. Have a secular (non-religious) purpose 2. Not have the primary effect of advancing or inhibiting religion 3. Not foster excessive entanglement of government with religion 1. Have a religious purpose 2. Not have the primary effect of advancing or inhibiting religion O 3. Not foster excessive entanglement of government with religion 1. Have a religious purpose 2. Have the primary effect of advancing or inhibiting religion 3. Not foster excessive entanglement of government with religion 1. Have a religious purpose 2. Have the primary effect of advancing or inhibiting religion 3. Foster excessive entanglement of government with religion