Adam Brown

On the other hand, it seems pretty natural when you do combine quantum mechanics and gravity and try and fit them all together in a consistent picture.

If universes can expand a lot, then the

At all, according to the gravitational theory, then quantum mechanics will naturally populate those bits that can expand a lot.

And so you'll naturally end up with an expanding universe.

So I would say probably in my heart, slightly higher than 50%, but I'm going to round it down to 50 out of epistemic humility.

For the people outside of the bubble.

Yeah.

So the thing about these bubbles is that they tend to expand at the speed of light.

So even if you start off outside, you're probably going to end up inside them in short order unless you run away very quickly.

Yeah.

So this isn't something that we make in the lab and then just remains in a box in the lab and then we use to do things.

This would be something that we would do or maybe would just happen to us because of spontaneous vacuum decay and it would engulf

all of our future light cone.

And so we wouldn't, it's not a box that you're using to do things.

It's a new place that you live.

You better hope that you've engineered that stuff so that that new place is still hospitable for life.

That is a big negative externality, destroying your future light cone.

And in a world with big negative externalities, libertarian fantasies can't really happen.

It has pretty good big governance implications, is that if it is possible for people just to wipe out

their entire future light cone, not only themselves, but everybody else who wishes to participate in that future light cone, then we're going to need a government structure that prevents them from doing so.