Is Evil proportionally greater in the world today than it was say five hundred or a thousand years ago?

This is difficult to say because we have statistics or reliable information about conditions in general during those times. Also we can be sure that the constituents of Evil were probably different then and displayed different forms from those prevalent today. Probably, too, it is less obvious today and manifests in a more subtle and sinister manner. Even as humankind has matured in sophistication so has Evil.