If we discount these other explanations of the Fermi paradox, then we alone must be the most advanced civilization in the Galaxy.

It may be our destiny to be the first to explore the Milky Way Galaxy and to colonize the stars with our descendants.

On the other hand, radio methods of communication are undoubtedly the least expensive way, and we have only had this ability for an instant (70 years) in Earth's history.

Goldsmith and Owen (2001):
"If we mean to be serious about finding other civilizations, our avenues are clear: Keep looking, keep listening, keep thinking, and our chances for eventually joining the galactic club will increase."