Whether a broken promise merely sounds in damages or lets the innocent party walk away from the contract altogether turns on distinctions drawn in this chapter. It begins with what a breach is and the elements of a claim, then moves to the classification of terms as conditions, warranties or innominate terms, the routes by which a term becomes a condition, and when time stipulations are of the essence. From there it works through repudiatory and anticipatory breach, the innocent party's election between accepting the repudiation and affirming, and the consequences that flow once termination takes effect. It closes with entire and severable obligations, substantial performance, and the measure of damages alongside the limits of remoteness and mitigation.