I think the only ethically justifiable war would be on antibiotics, because someone using them incorrectly could cause an outbreak of drug-resistant microbes that would also affect responsible people.
People giving themselves diabetes is sad, but it's ultimately a personal choice. (That said, I do support education, restrictions on advertising, etc., to help people make the right choices.)
Like, if someone or something else starts a war on us, we can self-defense them, but otherwise let's try to get this word out of our collective vocabulary by ceasing all the unnecessary and harmful wars we're fighting.
War is not the answer. It is the ONLY answer. See: War on (choose one: cancer, poverty, AIDS, terrorism, bullying, guns, etc). More seriously, war rhetoric reduces the idea of real war to a banality.
