ALEXANDER OF APHRODISIAS ON THE CAUSES OF ANIMAL GENERATION

Abstract

The discussion of the soul as a principle of life in ancient Greek philosophy was not limited to the soul’s relation to the body, the capacities of the soul, and the functions of the living organism. The debates about the soul and life also concerned issues of embryogenesis, such as the generation, formation, and animation of an organic body in the womb. The fragments of these debates can be traced in the writings of Alexander of Aphrodisias, particularly in his treatise On the Soul. In this paper, I examine Alexander’s views on animal reproduction, especially considering the problematic question of the life and animation of the embryo. Analyzing generation among the other capacities of the nutritive soul in On the Soul, Alexander considers the causes of embryogenesis. As the first cause, he indicates the nutritive capacity, which is transmitted from the parent through the seed and acts in the embryo. In addition, as Simplicius states in his commentary on Aristotle’s Physics, Alexander claims that the soul of the parent acts as a paradeigma that specifies the order and the goal of the embryo’s development. Thus, I explain Alexander’s understanding of the causes of the embryo’s development and animation in the context of his idea of the soul as a capacity (δύναμις) and state (ἕξις).