Abstract
This study is a comprehensive account of Plato's ontology as found in the dialogues. The author shows a thorough knowledge of most of the work done in the English speaking analytic tradition on Plato. The work's major thesis is that there are a number of significant changes in Plato's works, which either reflect a clear development or a radical revision of both methods and interests. The author is especially against a unitarian interpretation of the dialogues, which sees the Forms as the major topic throughout Plato's works. He does not, though, simply side with a revisionist interpretation, for he presents Plato as returning to previous approaches even in a late dialogue.