Abstract

Philosophical discussion of the topic of intentional agency has often focused on questions about the nature of the events which are intentional actions. This event-oriented approach cannot yield an adequate account of human agency because it cannot accommodate negative acts, or acts of omission. Agents may act intentionally by omitting to act, but many such acts of omission cannot be identified with any event consisting of a bodily movement. This dissertation is an attempt to develop an account of agency which can accommodate acts of omission. In the course of this, generally accepted views about the causal powers of agents, the ontology of action, the relation between an intention and the act which realizes it and the abilities exercised in acting are challenged. In Chapter One it is argued that causation by acts of omission cannot be explicated in terms of event causation and that the abilities which an agent exercises in intentionally omitting must be analyzed as second order abilities. Views according to which acts of omission are in some way constituted by positive actions are surveyed and criticized in Chapter Two. It is claimed that an agent omits to act by forming a negative intention, but this mental act is not identical to the act of omission. Acts of omission are states of affairs which obtain or facts and are not events. In Chapter Three it is shown that certain positive non-basic acts like killings also cannot be identified with any event because no event could have the requisite temporal and causal properties. Two important differences between positive and negative acts are identified in Chapter Four. The relation between a positive intention and behavior which realizes it is a causal one, but negative intentions do not cause the behavior which realizes them. A person may perform a positive action and may be responsible for this even though he lacks the ability to refrain from doing so, but to omit to perform some action and to be responsible for this, a person must have the ability to perform it