Space and time are unified by special relativity if you ignore matter
Spacetime and matter are unified by general relativity if you ignore consciousness
Spacetimematter and consciousness are unified by quantum mechanics if you ignore not-even-wrongness
Well, Special rev and Qm are unified in QFT, GR and QM still haven't been unified into quantum gravity. Def up in the air (and probably not true) whether consciousness needs QM. I like the brainstorm though!