What does one do about one's friends? I am not talking about web friends, but people one knows from childhood and tbough work for 50 or 60 years.

One lives in different countries and different time zones. We lost touch for decades because there was no easy way for us to connect.

Nobody has time to sit on the phone and write ling emails individually to everybody.

Facebook provides a service nobody else does - a place where most people go so it's easy to find everybody together.