Diablo 4 - Rathma (minor spoiler)

I’m still playing the story, but I got a question that has been bothering me. On the cutscene between Rathma and Inarious, was Rathma alive all this time? As in, he just died recently? According to Donan, he brought the propecy to Inarious, leading him to kill Rathma. I just want to confirm that the flashback was decades ago and not centuries. Thanks.

Rathma was a first generation nephalem. A literal son of Inarius and Lilith. He was ageless.