The talk begins by highlighting advancements through the 1980s, 1990s, and recently. Some discussion of why the results are interesting from the perspective of people working outside of the area of probabilistic analysis of propositional Satisfiability follows. This includes mention of the correlation with empirical results, e.g. the unit clause rule. Then the talk will concentrate on several techniques that have been the workhorse for achieving probabilistic results. This will include a discussion of probabilities of structural properties (e.g. those exploited in classes such as extended Horn, Balanced, q-Horn, SLUR, and so on) in addition to probabilities of being satisfiable. Possibly included will be a discussion of spectral results such as those obtained recently by Goerdt.