Or put this way. If Vladimir Putin is indeed immortal and eternal, as are oligarchs and everyone at the Russian Academy of Sciences, consider this scenario.
If Earth was cut off by the SD Lucifer's destruction in 2335, Putin and his immortal oligarchs, including 399-year-old Gennady Mesyats, 389-year-old Vladimir Fortov, 387-year-old Lev Zeleny, 394-year-old astronomer Alexander Zakharov, 399-year-old Erik Galimov, and 399-year-old mathematician Yury Osipov, took over Earth and instigated all riots to rename all things Putin to glorify the eternal leader of all Terran-kind. Sol is renamed Putin, Earth and the Terrans themselves are renamed Putin, leading to terms such as Putinkind or Putinity. The GTA in Sol is no more. The Putin Regime has risen. Organized crime and terrorism are encouraged thousandfold. Embezzlement, fraud, beatings, murders, extortion, feudalistic fiefdoms and lawlessness are rampant across interplanetary Putin society on not only Putin, but also Mars, Jupiter, Saturn, Uranus, Neptune and the Kuiper Belt. Humanity development in Sol will come to a stop, and everything became ageless, with most of what was left of the old GTA military being repurposed and augmented to operate for eternity.
When the GTVA reestablishes contact with Earth, they get overrun by Putin forces. Then the GTVA is replaced by the Galactic Putin Alliance. Vasudans are attacked.
Clearly, I think Fortov and his academicians will not go into their graves in our lifetimes, as with Putin. I think their immortality is due to anticancer drugs, as well as eternal life bacteria, but their immortality has yet to be scientifically proven.