For thousands of years people have wondered about reality. Some eastern philosophers concluded that the world is an illusion but the west split between materialism, that matter is real, and idealism, that it reflects something else. Logically, one of these world views must be wrong, and orthodox science and religion took opposite sides on the issue.
QR1.2.1. Idealism vs. Physicalism
QR1.2.2. Dualism
QR1.2.3. Virtualism
QR1.2.4. The Reality Options
QR1.2.5. Quantum Realism
QR1.2.6. The End of Science?