"[C]osmological limits of agency... [W]hat's the best that the universe can do? There's about... 10100k bits of free energy out there. What could be achieved? ... [Egyptian pyramids have] been achieved... Maybe... astro-engineering... [T]ake a galaxy that's rotating clockwise and make it rotate anti-clockwise? ...I suspect ...maybe yes. ...[T]urn the expanding universe into a contracting universe? ...I'm sure the answer is no."