Start a war!
It worked for many years.
Wars are spectacular, but in the order of things, don't kill that many people: disease and starvation are the big killers. I would imagine despots are next: Po Pot, Sudan Hussain, Stalin... Small scale, but apparently Henry VIII, not only killed his wife's, he also wrote-off 4,000 other people. I think in the First WW more people died of flu than combat, same for the Crimean War. 5M people die from maleria each year. Wars also stimulate breeding: the baby boom of WWII for example. The other point is that war tends to kill men, but it's the women that hatch the babies.
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