The function of the federal government is to secure unalienable Rights of the People.
See Declaration of Independence

In order to prevent misconstruction or abuse of the powers of the federal government, the Bill or Rights was written.  See Preamble, Bill of Rights, United States Constitution

The Bill of Rights further defines major unalientable Rights of the People:

No law respecting an establishment of religion, or prohibiting the free exercise thereof

No law abridging the freedom of speech

No law abridging the freedom of the press

No law abridging right of the people peaceably to assemble

No law abridging the right of the people to petition the Government for a redress of grievances
No law abridging the right of the people to keep and bear Arms

No law prescribing the quartering of soliders during times of peace without consent of the Owner

No law prescribing the quartering of soliders during times of war without consent of the Owner, but in a manner prescribe by law

The People shall be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures

No warrants shall be issued without probably caused and supported by Oath

No person shall be held to answer for a capital, or otherwise infamous crime, unless on a presentment or indictment of a Grand Jury

No person shall be subject for the same offence to be twice put in jeopardy of life or limb

No person shall be  compelled in any criminal case to be a witness against himself

No person shall be deprived of life, liberty, or property, without due process of law

No person shall be stripped of private property to be taken for public use, without just compensation

The criminally accused shall enjoy the right to a speedy and public trial, by an impartial jury

The criminally accused shall  be informed of the nature and cause of the accusation

The criminally accused shall be confronted with the witnesses against him

The criminally accused shall have compulsory process for obtaining witnesses in his favor

The criminally accused shall have the Assistance of Counsel for his defense

Excessive bail shall not be required

Excessive fines shall not be imposed

No cruel and unusual punishments inflicted

The rights listed in the Constitution shall not be construed to deny or disparage other rights retained by the People

The powers not delegated to the United States, nor prohibited to the States, are reserved to the States , or to the people.

-----------------------------------------------------------------------------------------

Think of all the laws that violate these rights and ask yourself, what are you prepared to do about it?