As further evidence that the vow blocks killing all the people consider this.
The vow blocks Harry from telling muggels about magic and starting mass healing. At the time it blocks him the ideas he thought of were transfiguring nuclear weapons and plagues that could replicate before the transfiguration wore off. Neither of those poses any danger to “the world” but they pose great danger to the worlds people. Harry doesn’t think of up quarks until after he has already been blocked. So the vow seems to be interpreted as killing everyone being the end of the world. Which is quite possibly how Harry understood it.
He also thought of antimatter, negatively charged strangelets, black holes, and up quarks, any one of which could, potentially, physically destroy the Earth.
Note also that if the vow interprets the words to mean the physical Earth, then future starlifting Harry could make a replica Earth and move all the muggles there, then tell them about magic.
As further evidence that the vow blocks killing all the people consider this.
The vow blocks Harry from telling muggels about magic and starting mass healing. At the time it blocks him the ideas he thought of were transfiguring nuclear weapons and plagues that could replicate before the transfiguration wore off. Neither of those poses any danger to “the world” but they pose great danger to the worlds people. Harry doesn’t think of up quarks until after he has already been blocked. So the vow seems to be interpreted as killing everyone being the end of the world. Which is quite possibly how Harry understood it.
He also thought of antimatter, negatively charged strangelets, black holes, and up quarks, any one of which could, potentially, physically destroy the Earth.
Note also that if the vow interprets the words to mean the physical Earth, then future starlifting Harry could make a replica Earth and move all the muggles there, then tell them about magic.