The continental congress assumed the powers of a central government, organized an army and navy, made plans to issue money, and appointed george washington as commander of the continental army.

 The SECOND Continental Congress.

The First Continental Congress had met in Philadelphia in September/October, 1774, in regard to what the colonies saw as "Intolerable Acts" passed by British Parliament after the Boston Tea Party.  That meeting had called for a second congress to meet if the British did not respond satisfactorily to the colonists' concerns.

So, when Britain did not yield, the American colonies convened the Second Continental Congress in Philadelphia, beginning in May, 1775.  The Philadelphia sessions of the Second Continental Congress lasted till December, 1776.  There followed further sessions of the Second Continental Congress that continued through 1781, not only in Philadelphia, but also in Baltimore, Maryland, Lancaster, Pennsylvania, and York, Pennsylvania.

the answer should be arrogance & pride.

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.