You guys seriously expect Elon Musk of all people to save humanity lol? Also Venus is a nightmare and Mars can never hold an atmosphere due to it's lack of a magnetic field. No matter how badly we fuck up Earth it will always be easier to live on than other planets. If you could terraform a planet (unfeasible) you could just terraform Earth. If you can't and have to settle for living in domes, you could just do that on a polluted Earth as well.
Venus' upper layer atmosphere is actually suitable for living, with earth-like temperature and gravity, so humans could live there using giant balloons.
Yes, Mars have thin atmosphere and no magnetic field that protects it from sun's radiation, but humans can still live there by building settlements underground, in which they're protected from stuffs.
Faster than light travel is 100% impossible meaning travel to other stars is limited by the maximum number of g's the human body can comfortably withstand for extended time periods (not much more than 1 as it turns out). In all likelihood we will never migrate outside of the solar system.
Travelling faster than light is still pretty much impossible to attain, but that doesn't mean that humanity can't innovate in creating better propulsion engines for the rockets, that is faster and more efficient that the current one we have.
Besides, nobody talks about going outside the solar system, since there's still plenty of places in our solar system that could sustain life, like in the Jupiter moons for example.
As for being a "type 1" civilization, oh yeah we'll definitely be capturing 100% of all solar energy that reaches the planet and increasing our energy consumption by 100,000% within the next 10 decades, that's soo plausible.
lol, you clearly underestimated about the technological advancement that could happen in just 100 years,
Like, have you look about what happened in the past 100 years, where we only have cars with 25 horsepower in early 1900's, to being able to send humans to space, and living in space station in less than 100 years?
And now our technology already much more advance in just 20 years or so, where we now have:
- Internet with super high speed, compared to the dial-up connection in late 1990's and early 2000's
- Mobile phones that becomes a multi-purpose device, and with very compact size, instead of only for making phone calls and short messaging
- Electric vehicles being mass-produced
- AI's starting being used in many fields
- Digitalization in many aspects, like money, IDs, etc
That's only a few examples about how our technology have advanced in just a
very short time, and we still have 80 more years before we enter the 22nd century, in which the technology would be even more advanced compared to today.