I can assure you that we would not have done so had we not exhausted every private opportunity through consistent, unmistakable, and authoritative messages over an extended period of time.
We need to use every politically correct and scientifically sound trick in the book to convince the world that humanity really is the most important species endangered by climate change.
Little was said about his sadness of being alone, or of missing his new bride, except at the very end of his letters where an unmistakable "I love you" was written.