Free will is not determined by a limitation on the speed of light. The problem is that we cannot determine via an absolute frame of reference when two events ha

Free will is not determined by a limitation on the speed of light. The problem is that we cannot determine via an absolute frame of reference when two events have occurred in time. The assumption is that causality will be violated if we are able to send a message faster than the speed of light, this is a mathematical solution only in the event that there is no absolute frame of reference. Since we do not know if there is one or not, we make the simplifying assumption that there is none. Whether or not this assumption is correct is not determinable at this time. If we are able to send messages at some speed faster than the speed of light (by any factor you wish), we will still be in the same situation as we are now, not being able to determine when two events have occurred relative to one another. If we find that we are able to send instantaneous message between any two points, we will then have found the absolute frame of reference to measure when two events have take place. Causality will not be violated in either scenario.