>unless someone revolutionizes space travel by figuring out how to bend spacetime more efficiently than with sheer mass, and makes something like the Alcubierre drive feasible.
The bigger problem here is just that genuine negative inertial mass (which you need for warp drives) is considered to be probably impossible for good reason, since it lets you both violate causality and create perpetual motion machines.
>unless someone revolutionizes space travel by figuring out how to bend spacetime more efficiently than with sheer mass, and makes something like the Alcubierre drive feasible.
The bigger problem here is just that genuine negative inertial mass (which you need for warp drives) is considered to be probably impossible for good reason, since it lets you both violate causality and create perpetual motion machines.