What effects did slave labor have on the colonial economy?

Answer back ASAP !!!

Americans of European extraction and slaves contributed greatly to the population growth in the Republic and State of Texas. Settlements grew and developed more land under cultivation in cotton and other commodities. The cotton industry flourished in East Texas, where enslaved labor became most widely used

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).