Irving Kristol and Nathan Glazer -- actual neo-conservatives -- write about the history of that intellectual movement in their respective articles here and here. Notably, as Kristol says in discussing the history of The Public Interest:
We made one easy editorial decision at the outset: no discussion of foreign policy or foreign affairs. Vietnam was arousing a storm of controversy at the time, and we knew that our group had a wide spectrum of opinion on the issue. We did not want any of the space in our modest-sized quarterly to be swallowed up by Vietnam. The simplest solution was to ban foreign affairs and foreign policy from our pages.And as Glazer points out:
How the term "neoconservatism" morphed from a political tendency that dealt almost entirely with domestic social policy to one that deals almost entirely -- indeed, entirely --with foreign policy is an interesting question, which I will not explore further here. There is very little overlap between those who promoted the neoconservatism of the 1970s and those committed to its latter-day manifestation.It is an interesting question how a term comes to mean something nearly the opposite of what it originally stood for.