However, the motivations driving the development of this technology are more diverse than scientific and engineering. There is clear-as-day evidence of military and military-related conceptualization and funding in computer networking going all the way back to defense initiatives in the 1950s.
An early 1960s Baran paper needs to be cited when discussing the origins of the Internet: "Reliable Digitial Communications Systems Using Unreliable Network Repeater Nodes".
https://www.rand.org/content/dam/rand/pubs/papers/2008/P1995...
This paper clearly extends computing and communications work done at RAND and the Air Force on SAGE, and it is likely that this strongly influenced what ARPANET became. Reliable Using Unreliable would at the very least drive or be used to support funding of ARPANET.
The "military origins" perspective is elaborated on in Ronda Hauben's "The Birth and Development of the ARPANET".