Explain the underlying factors amid the events in the 1770s that led the colonies to declare their independence from britain

The following the major factors:

Stamp Act -1765-1766; this tax is presented on legal documents to compensate for defense of colonies. 

Americans boycotted British goods: they were angry as they were the only colonies who needed to pay for this tax

Townsend Acts - 1767; this tax is on products colonies that required- glass, lead, paints, paper, and tea. The Americans boycotted, and British eventually repealed all taxes except the one on tea. In response to sometimes violent protests, British sent more troops to America.

Boston Massacre - 1770; 5 colonists killed after mob on one lone guard. The guard had called for help, someone shouted "fire" & British men shot down 5 colonists. This event was viewed as an example of British cruelty and used as propaganda, especially by Paul Revere.

Tea Act - 1773; British lowered the price of tea extremely. Led to the Boston Tea Party.

Boston Tea Party - 1773; colonists outfitted as Indians stormed into the Boston harbor and deserted 23 thousand pounds of tea into the harbor. British ships were burned. 

Gaspée Affair - 1774; A British warship, named the Gaspée, burned, and the captain was terribly wounded.

The Intolerable Acts - 1744; King closed Boston harbor to everything but British ships. He conducted lots of British troops to Boston. The colonists had to feed and house the troops. The Quebec act stretched out to Canadian borders to cut off western colonies of Connecticut, Virginia, and Massachusetts.

First Continental Congress - September, 1774; brought together Representatives from each colony, except Georgia, to discuss their response to the British "Intolerable Acts".

Battle of Lexington and Concord - April 19th,1775; colonists send troops to Boston. 1st shots were fired for the revolution.  Americans fought British before they arrived in concord, without honor, and shot them in the backs. This then transformed into the American Revolution.

Battle of Bunker Hill - June 17th, 1775; British troops sent to the fort were shot down one by one, even though the Americans had close to no powder, and the British were down by half their men

2nd Continental Congress - 1775; Delegates of the 13 colonies gathered in Philadelphia and sent an olive branch to King George. He declined and announced the colonies in rebellion.

And on July 4th, 1776; 50 men signed the declaration of freedom from Britain. This is the declaration of independence.

from the conditions of the working class in england by friedrich engels,the main idea is :

the answer is richard nixion