False. "If they stray into these territories, they are likely to be attacked and/or killed. A majority of male lions die during this time,....In a typical natural population of lions, about 23 to 30 percent of the animals are males, Hunter said." That means that roughly half of all male lions die out. In contrast, maybe in WWII half of German males were killed, and that was the most brutal death rate in the last century. https://www.livescience.com/41572-male-lion-survival.html