I'm not sure if you disagree with me or not from this comment. Tech isn't the only thing that affects the relative strength of individuals vs corporations (regulation, social pressures, etc).
Also I think it's not unreasonable to argue that corporations are more powerful today than they were during any of the time periods you've listed here.
Also I think it's not unreasonable to argue that corporations are more powerful today than they were during any of the time periods you've listed here.