2. His Life Philosophy Was The "Golden Rule"
Despite being raised as Jewish, Wilder admitted in his personal memoir Kiss Me Like A Stranger: My Search For Love And Art that although he appreciated his Jewish heritage, he didn't identity as a practising Jew.
In fact, Wilder was an atheist, stating that he didn't believe in god or any of the specifics of the Jewish religion.
Instead, Wilder's life philosophy was the "Golden Rule", the principle of treating others the same way you'd like to be treated yourself. In his memoir, Wilder details the importance of this way of thinking, explaining how it governed many of his life decisions.