At a time when the planet seems more divided than ever, there came a moment on Tuesday night within the notoriously conflicted world of horseracing that gave us all pause for thought. Thought and utter sadness. The news of the death of Pat Smullen at the age of just 43 was followed by a flood of heartfelt tributes. They came both from within the racing world, united for once in sentiment, and from those outside its sphere, including the President of Ireland, Michael D. Higgins. As befits a man of...