Which historical events in your lifetime had the biggest impact on the United States? Pew research started conducting surveys to answer this question by generations, starting with the so-called Silent Generation. The article linked below summarizes their findings, and it makes interesting reading.
Life is multi-dimensional, and a life without faith seems two-dimensional and flat. The survey involved key events in US history, but I wonder what this might look like if someone could include a spiritual dimension in the thinking?
A Cup of Brouhaha 