 Reinach’s ideas have proven to be seminal for further investigations. For instance, von Hildebrand extends the idea of experiences that are in need of being heard to emotions: accordingly, some forms of love are claimed to exemplify that property as love can be reciprocated only if the loved one is aware of being loved (von Hildebrand 1930: 28f). Schapp applies Reinach’s idea of promises as generators of claims and commitments to develop a theory of economic contracts (1930). Also, Stein advances Reinach’s theory by discussing the possibility for states to be subject of social acts and, especially, of enactments (1925, see Taieb forthcoming).