There is a long-standing view that when Lennon and McCartney penned the words, “I get by with a little help from my friends,” they weren’t referring to people. Nonetheless, they hit upon an important truth: we all get by with a little help from our friends. In fact, it seems that we could all get to thrive with the help of our friends. Based on research on aging, it is clear that friends are an important lifestyle factor...