How is the act of burning feudal papers and manor houses by the peasantry during the Great Fear symbolic of the changes affecting France?

Great Fear, French Grande Peur, (1789) in the French Revolution, a period of panic and riot by peasants and others amid rumours of an “aristocratic conspiracy” by the king and the privileged to overthrow the Third Estate. The gathering of troops around Paris provoked insurrection, and on July 14 the Parisian rabble seized the Bastille. In the provinces the peasants rose against their lords, attacking châteaus and destroying feudal documents. To check the peasants, the National Constituent Assembly decreed the abolition of the feudal regime and introduced the Declaration of the Rights of Man and of the Citizen.

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.

2018 means 2018 ce or common era

there have been other eras too including bce, which included way more years.