Discoveries in the physical and biological sciences suggest that intelligence is widely distributed throughout the universe. Before long, either we will decide that these discoveries have pointed us towards a false conclusion, or we will obtain undeniable evidence of extraterrestrial life. After finding one extraterrestrial society, we are likely to discover others and, in this manner, become a part of the "Galactic Club". Following the "slow track", an initial encounter will lead to accelerated search efforts that will put us in touch, one by one, with additional societies. Following the "fast track", our initial contact will be with an affiliate of the Galactic Club, and this society will give us instant access to other members. The physical constraints imposed by interstellar distances, coupled with our understanding of large social systems, suggest that the Galactic Club will be large, stable, slow-paced, and exert only loose control over its members. The two tracks have different implications for managing initial contact, protecting our security, knowledge transfer, handling culture change, and preserving our identity. (C) 2000 Elsevier Science Ltd. All rights reserved.
