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According to modal interpretations of quantum mechanics, a state possesses definite values even if it is not an eigenstate. On the other hand, Kochen-Specker theorem holds that all possible possessed values by a system can not be definite. Consequently, modal interpretations to block this theorem, take new metaphysics of properties. In this dissertation, I will show that dispositionalism is that metaphysics. According to dispositionalism, causal powers of a property are constituents of the property. As regards this outline, the thesis would be divided into 5 chapters. In chapter one, presuppositions of later arguments are clarified. Chapter two is related to algebra of properties and finally... 

The problem of the divine actin in nature in its traditional form has been raised as the relation between the entities which have origination and eternal entities. However, the new form of this problem is how the divine action would be compatible with the basic assumptions of naturalism and physicalism, especially causal closure. In the present dissertation, two approaches in this issue are examined. First one is a metaphysical perspective and tries to explain the divine action through the laws of nature. The second approach is a science-based perspective and tries to solve the problem through physical indeterminations, especially in quantum mechanics. I advocate the first approach, with...