A Mathematical Theory of Causality
Judea Pearl's Theory of Causality
To my mind Judea Pearl's approach to causality is unique among all views in being both incredibly insightful and precise as the same time. Despite this, as I studied causality in philosophy it was not among the views presented. Sometimes there is truth to the claim that a practical approach to a theoretical problem places pragmatism before truth, but in this case I think the pragmatic aspect helps us probe even deeper into the heart of the problem.