A Combinatorial Theory of Possibility Author:D. M. Armstrong David Armstrong's new book is a contribution to recent philosophical discussion about possible worlds. Taking Wittgenstein's Tractatus as his point of departure, Professor Armstrong argues that nonactual possibilities and possible worlds are recombinations of actually existing elements, and as such are useful fictions. There is an extended criti... more »cism of the alternative-possible-worlds approach championed by the American philosopher David Lewis. This major new work will be read with interest by a wide range of philosophers.« less