 The four main characteristics of Hacking’s “big revolutions” are that they lead to whole new interdisciplinary complexes, replete with new social institutions and corresponding social changes, and they alter that period’s overall take on, or “feel” for, the universe. For critical discussion of Hacking on styles of reasoning, see Kusch (2010) and Scortino (2016). For more on Hacking, see section 5.3 below.