A gaslighter is usually narcissistic, but a narcissist is not always a gaslighter. Narcists tend to want to be dominant to those around them. Gaslighting is an excellent technique for this purpose to be able to control those around them. Gaslighters make their victims doubt themselves, and this form of abuse causes a person to lose their sense of identity, perception, and value. Gaslighting is, therefore, a form of narcissism.