Earlier quoted context omitted.
I think it's strange to believe that a starship could enter the solar system without being noticed due to the requirements of: - velocity --- it would need to be moving quickly and would have to decelerate (requires energy) to do more than pass through - life support/technology requirements and attendant heat signature --- interstellar space is _cold_ and not conducive to either, so requires on-going energy output -…
Are you suggesting American humans have reached the pinnacle of understanding how the Universe works? With our technology, we could easily avoid being seen by a hunter-gatherer society. Do you imagine that your society does not have similar blind spots? How much arrogance there is in the modern Euro-centric world. Because the society has explored beyond what our grandparents believed possible, suddenly we are the pin…
Consider for example the "one-electron" hypothesis --- a far simpler take on it is that the electron is a fundamental particle and that we are nearing an end-game of understanding sub-atomic physics and realizing Einstein's dream of a grand-unified theory --- the universe doesn't seem to be shaped and formed so as to allow for FTL, so one instead needs to work within the bounds of converting mass to energy.