One of the many unique aspects of the time in which we live is that it is no longer unusual to have more than one career in a lifetime.  Since the beginning of the Information Age 30 years ago it has been increasingly common for adults to have two or even three careers during their lifetimes.  Historically this is absolutely understandable.

Three hundred years ago one usually did the same work that one’s parents did, and usually in the same place. One hundred years ago, in the middle of the Industrial Age when new careers or jobs were being constantly created, …