Time wasn't a thing; energy was. Capable of taking any form at one point and then another at a different point, the energy carried the records of what they once were.
And since universal energies stayed within the bounds of its domain, these records were accessible to whoever could glimpse at them.
During his evolution, Alex had lived the beginning of his universe, seeing the first organism to ever come to life and the trials and errors that went into shaping the ideal species to dominate the universe.
Through this baptism and rebirth, he experienced the pain and suffering humans went through battling the void creatures, veil tears, cosmic mana waves and whatever madness in between.
It was heartbreaking. But humanity was not so weak. With the introduction of magical energy, they were able to make a stand, and it took them over a millennia to reach this point.