Who wrote the declaration of independence what were the three different parts of the declaration?

The Declaration of Independence is the statement adopted by the Second Continental Congress meeting at the Pennsylvania State House in Philadelphia on July 4, 1776, Written by Thomas Jefferson. 
Three parts,
1.Intentthey're rationale for why they are writing the document, the rights of individuals, and the purpose of government2. List of grievancesall of the unjust things the King George such as taxation without representation, his refusal to do things in the common good of the people, and his allowing of soldiers live in citizen's home without consent3.Declarationthis states that they are breaking away from Great Britain