I believe, though I have no proof, that without unions, no workers' rights would exist, anywhere. I really would hate to find out that I was right.

I'm absolutely sure you're right in the historical sense: that had there never been unions, no workers' rights would currently exist, anywhere.

I am slightly less sure, but only slightly less, that you're right in the present-day sense: that if unions were to be abolished today and not replaced, then sooner or later no workers' rights would exist, anywhere.

I hope we don't see that demonstrated.