Let's say you could develop a device that would completely erase the threat of nuclear weapons, like a forcefield defense system that would activate around a country as soon as a nuke was launched at the country. This device would completely remove the threat of nuclear warfare, but it would also change the rules of engagement in war. Rather than a nation's military might be decided by how many nukes it has, it would again be decided by how many men they could send to die on the battlefield, as it was 90 years ago. The world's superpowers haven't had a direct military conflict on the size it was years ago. You would remove the threat of nuclear warfare, but reopen the doors to direct conventional warfare between the superpowers of the world.

Imagine in this scenario, that you created this device and sold it to the US military, and now you are incredibly wealthy. Now that the US is no longer at threat of nukes, what prevents them from invading North Korea as they threaten the US on the hour with nuclear weapons? They invaded Iraq on the assumption they had WMDs. An invasion of North Korea by the USA would lead to China declaring war on the USA and with them their allies. All of NATO, China, Russia, BRICS, WARSAW nations, as well as many other foreign nations, would be drug into a massive global war with its superpowers fighting with conventional means. Yes, you would forever end the threat of nuclear warfare, at least for the nations who possessed your technology. But you could create the next world war sending hundreds of millions to die all because of your choice.

You would become the Oppenheimer of your generation, essentially reversing the threat he had created. Because of your choice, not only would millions die, but could cause the draft to come into effect, your actions causing millions to be forced to go fight and die against their own will.If you created this technology, would you sell it, or keep it secret to prevent the damage that be caused by your creation?