The enclosure movement was this: wealthy farmers bought land from small farmers, then benefited from economies of scale in farming huge tracts of land. The enclosure movement led to improved crop production, such as the rotation of crops.
James Madison and Thomas Jefferson together
The Russian Winter stopped both of them in there tracks
The causes of the plague where people living in filth, not bathing and living with rats. The reason why it only spread as far as it did is because other religions that whereby Christian, bathed ritually. The effects of the plague where mass hysteria, famine, isolation and illness.