Pluto In Leo. The Second World War broke out as Pluto settled into a new sign (in Leo, 1937–57) and emphasized the concomitant disasters. But here there was a much more acceptable reason for war, and it was successful in spite of the appalling suffering and elimination of millions of innocent people. The good that came out of this influence was in the formation of the United Nations, which has very Leonine overtones. When Leo is a person’s Sun, Moon, or Ascendant sign, a power complex can develop. Generally a spark of Leo big-heartedness is present, especially if there are planets in other fire signs, but the enthusiasm of the fire element is suppressed. Here are people who were the first computer buffs, and who, because of Pluto in Leo, knew when to pull the plug to stop the machine from taking over.