According to Frank Tipler, the most fundamental of fundamentals, the most holy of holies, is that all that he postulates (resurrection, an afterlife, immortality) is predetermined by the laws of physics, no more and no less.
So what does Frank Tipler postulate? His basic premise is that life (including you and me), the Universe and everything will be resurrected down to the quantum level in what Tipler calls the Final Singularity or the Omega Point. This has nothing to do with religious mumbo-jumbo but expressible in the hardcore language of, and in the laws of physics. This is the ultimate goal of the cosmos which produced human intelligence which in turn will resurrect the cosmos (and all it ever did and does contain) at the Omega Point.
Frank Tipler starts with the laws of physics that will require that biological intelligence (meaning humans) will venture out into the Universe, and humans, being humans, will remake the Universe more to their liking. It’s a sort of super-sizing of Genesis 1: 28. Human intelligence will take control over the entire Universe which would appear to make us an inevitable Type 4 Civilization (which no astrobiologist has ever postulated, a Type 3 being the theoretical highest, one which has domain over an entire galaxy). That humans will evolve into a Type 4 Civilization, well that’s a pretty big ask and certainly not predictable according to any laws of physics I know. For comparison, astrobiologists tag our modern civilization as about Type 0.7, so we have a long, long way to go. The potential fly in the ointment is that humanity might just go kaput way before we come within shouting distance of achieving even Type 1 or Type 2 status.
In fact, what they (our descendants) will do, according to Tipler’s laws of physics, is halt the ever accelerating expansion of the Universe, reversing this into a Universe that starts contracting leading to a Big Crunch, or as Frank Tipler calls it, the Final Singularity or Omega Point. As far as I can determine, the laws of physics require no such mandatory astro-engineering on the part of intelligences in the cosmos. Frank Tipler doesn’t explain why he postulates this inevitable emergence that emerges out of the laws of physics. IMHO, if there is one thing that cannot be predicted as emergent phenomena from the physical sciences, it is behaviour and intent, human or animal.