Likewise, I hadn't know about his efforts to establish such things as international arbitration treaties (with the aim of abolishing war as a means of settling disputes among nations), a precursor to the League of Nations, a world court, and an international police--although his efforts bore little fruit in his lifetime, and, as an older man, his meddling in politics and foreign affairs appear to have annoyed many of the people he was trying to influence. Carnegie seems to have been ahead of his time in these peace-related matters. He failed spectacularly--his efforts were followed immediately by WWI and then by WWII--but they were noble ideas, nevertheless.
Long, but very well written and edited. It never drags. Highly recommended.