It's perfectly possible to remember every technological invention the military has ever been involved in and still object to participation in military research.

It's perfectly possible to remember every technological invention the military has ever been involved in and still object to participation in military research. Possible reasons, using Wernher von Braun's rocket development as an example: - He, or somebody else, would have invented rockets anyway at some point - That 'some point' would have been much earlier if the money spent on military (research & some of the rest) would instead have been put into rockets in the first place - even if the two mechanisms abovc were not true: I'd probably be willing to forgo the benefits of the space age if it meant undoing WW2 and the Holocaust - In most ethical frameworks except utilitarianism, it's strongly discourage to accept some evil for some perceived greater good. Meaning: Even if rockets have saved far more lives than WW2 vanquished, participating in the project is morally dubious at best Specifically to Google's project: - This seems to actually invert the usual idea of the military funding basic research that later gets adapted for civilian use. They are building on the fundamental research into AI already done by Google and others, and using it very specifically to kill people. Any advances useful for other purposes would seem to be even more coincidental than usual. - While "minimising collateral damage" i. e. civilian casualties may seem to be a worthy cause, it cannot be ignored that such advances are likely to result in greater use of the technology. Drones are actually the best example of this effect. Just look at the Obama administration's willingness to expand the use of drone strikes, which was a direct result of the technology appearing to be the lesser evil compared to manned missions on the ground.