Expand of europe"s horizon for reasons for trade (first) 1000 1300: population tripled: had been built primarily on agriculture. Population was very great in relation to the amount of technology available at the time. Sea route to greenland was becoming more difficult to access: people in greenland seized to exist. Black sea port first time it was encountered. Bubonic plague groin and armpits were where people found their first symptoms of the plague. Carried and spread through fleas traveling on rats, who traveled in merchant carts: explains how the plagues spread. People turned to religion, looking for answers: blamed jews. People died so quick, there wasn"t time to bury them. Arguably the same disease during justinian time but a bit morphed. Attempted to stop spread of disease by closing doors to their communities. Seem to have occasioned some extreme actions: ex: flagellants beat themselves in attempt to cleanse their sins. Pope tried to stop practice, but people continued practicing it.