The Preamble of the US Constitution
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."
When the U.S. Constitution was drafted to limit the power of the government as Thomas Jefferson said :"The two enemies of the people are criminals and government, so let us tie the second down with the chains of the Constitution so the second will not become the legalized version of the first."
This is important because the US Constitution is still important today, still being used, without it, most of us would not have a lot of power or rights. This connects to the larger struggle for voting rights because, there are amendments that allowed people of color to vote, allowing women to vote, being to vote for your Senator, no more poll taxes, and etc., it was created to better everyone and have a more equal community.