 In the 1980s, a revisionist school developed along with the breakdown of the two-party system and growing dealignment in several major industrialized democracies.It argues that partisan identity formed slowly in a Bayesian process as voters accumulate data and opinions over a lifetime.By late in life, a single new piece of information will have little effect, but there is always the opportunity for partisan identity to change and will fluctuate based on short-term events for many voters.