What was the "invisible hand" according to adam smith

Definition ; 
the unobservable market force that helps the demand and supply of goods in a free market to reach equilibrium automatically is the invisible hand. 
the phrase "invisible hand" was introduced by adam smith in his book ' the wealth of nations'

They looked like staggered steps mark me brainliest

South carolina was so angry about the election of lincoln that they seceded from the union on december 20, 1860. they attacked fort sumter later, on april 12, 1861.