Fundamentally, the 50th Reunion celebrates our 70 years on an Earth 4.2 billion years old, which may have only 3-4 billion left before the Andromeda Galaxy collision, or, if you believe in global warming, may be inhabitable for only 1000 years before our successors ship to Mars. See Universal Thoughts. 

Average life expectancy of male born 1948.

We live within a Universe of unlimited size and power. 

And someone’s throwing us a big party?  Sign me up! 

So, fundamentally, we’re celebrating our survival and common bonds.  We’re here, but sixteen-percent (16%) of our comrades have passed on.  See In Memorium.