Bob Hall was a rancher. In 1936, in the midst of the Depression, he was suffering from a cancer that was eating the flesh on the side of his face. His ranch had dwindled to nearly nothing, and weeks after bankers took the last of his livestock, Hall died, leaving his family deeply in debt.

His sons pleaded with anybody they could find to make a loan and save the family ranch. No one would do it. Finally, in desperation, they went to their neighbor, Buzz Newton, who was known for his miserliness, and asked him to co-sign a loan. “I always thought so much of your dad; he was the most generous man I have known,” Newton answered. “Yes, I’ll co-sign the note.”

Bob Hall’s grandson, also named Robert Hall, drew out the lesson in his book “This Land of Strangers,” noting: “The truth is, relationships are the most valuable and value-creating resource of any society. They are our lifelines to survive, grow and thrive.”

There’s a mountain of evidence suggesting that the quality of our relationships has been in steady decline for decades. In the 1980s, 20 percent of Americans said they were often lonely. Now it’s 40 percent. Suicide rates are now at a 30-year high. Depression rates have increased tenfold since 1960, which is not only a result of greater reporting. Most children born to mothers under 30 are born outside of marriage. There’s been a steady 30-year decline in Americans’ satisfaction with the peer-to-peer relationships at work.