They hang on awaiting vindication of their idea, that’s what happens…
George Kukla (born 1930) …became [in 1972] a central figure in convincing the United States government to take the dangers of climate change seriously. Kukla and geologist, Robert Matthews of Brown University, convened a historic conference, themed: “The Present Interglacial: How and When will it End?” Kukla and Matthews then highlighted the dangers of global cooling in Science magazine and, to President Richard Nixon.
The Nixon administration reacted swiftly to their letter, which described calamities such as killer frosts, lower food production and floods, to come. By February 1973, the State Department had established a Panel on the Present Interglacial, which advised Drs. Kukla and Matthews that it “was seized of the matter” and numerous other government agencies were soon included.
Kukla was co-author of a chapter in the book “Natural Climate Variability on Decade to Century Time Scales” published by the National Research Council.
Kukla believes all glacial periods in Earth’s history began with global warming (understood as an increase of area-weighted average global mean temperature). He believes Earth’s recent warming is mostly natural and will ultimately lead to a new ice age.
An interestingly but flawed report of what was going in 1972 is available via Google Books.