You'll have to forgive me if I'm feeling a little nostalgic this week, but like many of you, I'm in the process of packing up my son for college. In just the last 18 years of Devin's life, the world has changed so dramatically.

That got me thinking about my Great Aunt Nina, born in 1901, who lived a full and eventful 100 years. It's truly amazing to think about all the incredible things Aunt Nina saw in the course of her lifetime. But I also think that looking back can provide some perspective, and some reassurance, to anyone worried about the future.