HEL What was the cause of the crusades and how did it impact Europe, North America and Asia??

Which of the following is/are a major technological advances of the mayan civilization? a. the calendar c. math b. architecture d. all of the above

What are the major problems with a command economy?

What was one of the advantages that the united states had over europe regarding the industrial revol the united states had a continuous supply of potential factory worker the united states imported workers from europe to work in factories. the workers in the united states were more skilled than the workers in europe the united states didn't actively participate in the industrial revolution. instead they imported most of their goods from other countries.