True DARPA started out as a redundant way of comm’s network. the Uni’s quickly understood it’s potential and started using it to transfer research results (I use it on a daily basis, PubMed and such).
Thing is, you could abuse any object you could think about, even a simple ‘biro’ (ballpoint) can be used to kill a grown man. Knowledge doesn’t kill, malicious use of knowledge can (the stuff we have in our work environment and the biochemical knowledge in my head are good enough to prepare something evil, but I choose not to .

Too bad the nukes where deviced out of pure fear that the ‘other’ side would have them before ‘we’ would. After the sad Hiroshima and Nagasaki bombing we now know the axis force where far from producing a nuclear weapon.

Since it’s their fault there even are nukes.