With a focus on causation what are some of the explanations for the growing weakness of the byzantine empire in the centuries before 1450

Compare how one's social status affect his or her opportunities in ancient greece and rome?

What did the crusaders wear? a.) gold crosses b.)wooden crosses c.)red crosses d.)silver crosses

The original tragedy of the commons concerned grazing cows and sheep in fourteenth century england. choose the statement about this tragedy of the commons that is correct. a. the tragedy of the commons in fourteenth century england was overcome by the common lands being enclosed and privatized. b. everyone had an incentive to ensure that the land was not over grazed. c. even with the tragedy of the commons, the use of the commons was efficient. d. the tragedy of the commons in fourteenth century england was overcome by falling wool prices and the decrease in the size of sheep flocks.