1. What factors determined the pattern of slavery in North America?

The argument has often been used to diminish the scale of slavery, reducing it to a crime committed by a few Southern planters, one that did not touch the rest of the United States. Slavery, the argument goes, was an inefficient system, and the labor of the enslaved was considered less productive than that of a free worker being paid a wage.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.