This came to me in a half-dreaming state, so it is somewhere between brilliant and ridiculous.
It is after World War 3. Not so much post-Apocalypse, as post-war boom, a kind of post-post-Apocalypse.
But the Earth’s population is now a tiny fraction of what it used to be. In contrast, technology has taken an incredible leap forward, if not moral righteousness. And the Resurrection Machine is created. At first it is just immediate family that is brought back. But then we start going further and further back. We repopulate the earth until it can no longer contain us. Then we begin to colonize space.
This is not a horror movie. This is genuine wonder and celestial dream, mixed with the Law of Unintended Consequences and humanity at its extremes. It is the Future meets the Past, and how we work that out, and both are understood and taken seriously.
That is my problem with Star Trek, for all its tech, you rarely see the consequences of really revolutionary tech, apart from an occasional transporter accident involving evil twins.
Alas, this all requires a knowledge of history, to do this properly, that far outstrips my own humble education.