Lawrence Berkeley National Laboratory

The causal structure of orthodox quantum theory involves, in a crucial way, certain choices that are made by human beings. These choices are free in the sense that they are not fixed, even statistically, by any known laws or rules, but are physically effective in that can influence in important ways the course of physically describle events. This provides an idea of the nature of human beings the differs significantly from the image generated by the materialist deterministic classical mechanics of the eighteenth and nineteenth centuries.