For thousands of years, people have wondered what is reality? What began as materialism, that only physical matter is real, evolved into physicalism, that the physical events we see are all that there is. Its contrast was idealism, that what we see reflects something else. Logically, one of these world views must be wrong, and orthodox science and orthodox religion have taken opposite sides on this issue.
QR1.2.1. Idealism vs. Physicalism
QR1.2.4. The Reality Options
QR1.2.5. Quantum Realism
QR1.2.6. The End of Science?