Well, after looking back over the archives I can see that we aren't likely to come to a meeting of minds on this topic. I think that property rights are a necessary precondition of production and trade, and therefore that abolishing copyright would lead to a precipitous decline in the production of intellectual property. You apparently believe that abolishing copyright would actually lead to an increase in such production.
On the good side, at least this is a question of fact and not some unmeasurable philosophical issue. Unfortunately, what we really need to settle the issue is an example of an actual modern society without copyright laws. AFAIK there isn't any such place, so we are left with a distressing absence of data.
Since you apparently don't accept the arguments from economic theory, or from historical precedent, I suppose we'll just have to continue to disagree until someone actually performs the experiment.
Billy Brown, MCSE+I