Important point. For us, as a type 0 / type I civilization, accelerating a large asteroid strikes us as an absurdly energy-intensive operation. But then, moving

Important point. For us, as a type 0 / type I civilization, accelerating a large asteroid strikes us as an absurdly energy-intensive operation. But then, moving a ton of cargo from Pennsylvania to California was an absurdly energy-intensive operation in the year 1800. 50 years later it was easy. For a civilization that is approaching type II status or beyond, the energy required to accelerate an asteroid is likely trivial. [0]https://en.wikipedia.org/wiki/Kardashev_scale https://en.wikipedia.org/wiki/Kardashev_scale