Ledbetter takes us through the ideological antecedents of Eisenhower's famous "military-industrial complex" speech, charts how usage of the phrase has changed since Ike used it, and describes how various politicians and activists have acted upon the concerns he popularized.
So, we get interesting discussion of the 1930s "merchants of death" movement, Ike's own studies of the army-industry relationship around the same time, C. Wright Mills, Norman Cousins (a big influence on Ike, surprisingly) SDS, and so on. Ledbetter has gone back to the speech's original drafts in order to trace who was responsible for contributing what, but the paper trail is very incomplete and much remains uncertain.
I particularly enjoyed the section on how the Vietnam-era Left put Ike's idea to use. There's a wistful pleasure merely in reading about the days when activists harassed weapons manufacturers and warmongerers---it's sadly clear that today's pseudo-Left is far too busy with "The Resistance" to be bothered with such things. However, one notes an ironic episode in 1970 in which protestors tried to shut down the University of Minnesota because of its connection with weapon making and research. Its president at the time, Malcolm Moos, had been Eisenhower's chief speechwriter, and may well have been responsible for launching the concept which, all unwittingly, the protestors were using as their basis for action.