Civil liberties relate to national security in that the preservation of individual rights often faces tension with governmental efforts to ensure safety. During times of crisis, such as war or terrorism, governments may enact measures that limit civil liberties—such as surveillance, restrictions on movement, or curbing freedom of speech—arguing it is necessary for public security. Balancing civil liberties with national security is a critical challenge for democracies, requiring vigilance to prevent overreach and ensure that fundamental rights are protected.