But none of our technology can really let us spread at this stage. We’re barely detectable from nearby solar systems. It’s very possible that the technology re

But none of our technology can really let us spread at this stage. We’re barely detectable from nearby solar systems. It’s very possible that the technology required to travel between solar systems is where the filter occurs and we’re in a narrow window of having enough technology to look around at nearby planets before we wipe ourselves out.