You're as clueless as ever. Protected industries are almost never exporters (i.e. they cannot compete on the world market, hence protection).
But there is not a universal impact on all sectors contrary to your belief.
There is a net welfare loss on the economy as a whole and that much is a mathematical certainty.
Since we were speaking about comparisions of power available the per capita evaluation becomes irrelevent.
Not so. Far from noting the obvious and undisputed fact that the north had a numerically larger industrial sector, you were attempting to portray the south as economically backwards and without even the most basic industrial implements when the fact is that they enjoyed a strong economy in those areas on world standards.
Protected industries can export particularly when the tariff is combined with subsidies which was often the case in the 1800s.
You have never seen me defend tariffs from an economic perspective. They are mostly political instruments.
Compared to the North which is the issue the South was obviously economically backward, See Rhett Butler for details.