Monopolies
Stifling of competition
Selling inferior products
Controlling working and living conditions
It would be "glacial flow" that represents a major process by which the Sun's energy is transported around the Earth system, since it is the initial energy from the Sun that melts that ice that creates such a flow--turning into kinetic energy.
Mathematics, mostly.
They also did groundbreaking work in the following fields:
Astronomy
Philosophy
Geography
Sciences
Technology
<em>In the Middle Ages the title of knight was granted to the bravest warriors, these were given land outside the palace of the king, to protect him from enemies.</em>
