Behavioural studies suggest that awareness of one's mortality, known as mortality salience, enhances the inclination to respond positively to prevailing societal values, fostering an adherence to social practices, for example, the treatment of the dead. Nevertheless, when acceptance of these societal values wanes, there is an increased motivation for their modification. This results in a series of subtle changes that eventually reshape the entire set of practices that define a community's social identity. This paper delves into the impact of mortality salience on the emergence, maintenance, and evolution of mortuary practices in south and west Messenia during the Middle Helladic and Late Helladic periods (c. 2050/2000 bce to 1200/1190 bce). This analysis explores how individuals addressed their mortality salience by adjusting their proximal (e.g. practices) and distal (e.g. ideology) defences. Moreover, it incorporates the notion of the ‘taming of the terror’, suggesting that individuals may adopt new practices as a strategy to manage or alleviate the fear associated with mortality. The analysis explores the introduction of new practices, providing valuable insights into how people navigate and comprehend the existential challenges brought about by the recognition of their mortality.