Love one another. My final lesson of history is the same as that of Jesus.
You may think that's a lot of lollipop but just try it. Love is the most practical thing in the world. If you take an attitude of love toward everybody you meet, you'll eventually get along.

When asked, at the age of 92, if he could summarize the lessons of history into a single sentence. As quoted in "Durants on History from the Ages, with Love," by Pam Proctor, Parade (6 August 1978) p. 12. Durant is quoting Jesus (from John 13:34) here, and might also be quoting Jiddu Krishnamurti: "Love is the most practical thing in the world. To love, to be kind, not to be greedy, not to be ambitious, not to be influenced by people but to think for yourself — these are all very practical things, and they will bring about a practical, happy society."