What is imperialism and how did it contribute to the beginning of wwi?

Imperialism and imperial rivalry provided both a cause and context for World War I. Imperialism is a system where a powerful nation controls and exploits one or more colonies. Colonies can also be invaluable sources of cheap labour, agricultural land and trading ports.

in mcculloch v. maryland (1819) the supreme court ruled that congress had implied powers under the necessary and proper clause of article i, section 8 of the constitution to create the second bank of the united states and that the state of maryland lacked the power to tax the bank.

gibbons v. ogden, (1824), was a landmark decision in which the supreme court of the united states held that the power to regulate interstate commerce, granted to congress by the commerce clause of the united states constitution, encompassed the power to regulate navigation.