Moralisation is an important factor in human behaviour with regard to acts of pro-sociality, that is to say actions which benefit society as a whole (Feinberg, Kovacheff, Teper, & Inbar, 2019; Francis & McNabb, 2020; Vanags, 2020). Whether a person believes an issue to be a moral concern holds it apart from other attitudes, and crucially has been shown to be a key predictor of behaviour (Feinberg et al., 2019). However, little research has been done on how and why some issues become moralised and others do not (Skitka, Hanson, Morgan, & Wisneski, 2021). Feinberg et al have recently proposed the 'Push-Pull' model of moralisation (PPMM), along with some innovative empirical work offering partial support for the model. More experimental work is necessary to determine the model's validity. This study seeks to explore the PPMM building on the original study's longitudinal approach, using a different focal issue and specifically investigating psychological reactance (Hong & Faedda, 1996) as a possible mediator of moralisation.