Which Constitutional amendment primarily protects against unreasonable searches and seizures?

The 4th Amendment is the Constitutional amendment that primarily protects individuals against unreasonable searches and seizures. This protection is foundational to the concept of personal privacy and security, ensuring that law enforcement requires a warrant supported by probable cause before searching an individual's property or seizing their belongings. The essence of this amendment is to prevent arbitrary intrusions by the government into people's lives, thus establishing a crucial check on the powers of law enforcement. The amendment states that "the right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated," which is key to upholding the rule of law and safeguarding civil liberties within the United States.