The awareness of personal mortality likely emerged gradually in the genus Homo, becoming probable by the time of Homo heidelbergensis and unmistakable in Neanderthals and early Homo sapiens.
From History: Reference Date: 2200 CE (+/- 50 years)
The Dawn of Empirical Spirituality imagines a future where religion better distinguishes truth from belief. Spiritual traditions may endure by honoring meaning, morality, and the unknowable while yielding empirical claims to science.
When publicly discussing spirituality, distinguish thought of the material world, what we directly experience, from the spiritual interpretations beyond it. Organize each spiritual idea into agnostic, nontheistic, and theistic.
Pythagoras exemplifies rational pragmatism and reminds us that authority is often topic specific. Choose your authorities carefully, because good authority is usually limited to a specific set of subjects.