Source incompatibilism and its alternatives

In current debates about moral responsibility, it is common to differentiate two fundamentally different incompatibilist positions: Leeway Incompatibilism and Source Incompatibilism. The present paper argues that this is a bad dichotomy. Those forms of Leeway Incompatibilism that have no appeal to ‘origination’ or ‘ultimacy’ are problematic, which suggests that incompatibilists should prefer Source Incompatibilism. Two sub-classifications of Source Incompatibilism are then differentiated: Narrow Source Incompatibilism holds that alternative possibilities are outside the scope of what is required for moral responsibility, and Wide Source Incompatibilism holds that while ultimacy is most fundamental to moral responsibility, an agent meeting the ultimacy condition will also have alternative possibilities, thereby also satisfying an alternative possibilities condition. The present paper argues that the most promising incompatibilist positions will be versions of Wide Source Incompatibilism