This essay considers the problem of historicity together with the paradoxes of foundation. The concept of lifeworld has been studied mainly in order to clarify two orders of problems, the first concerning the relationship between history and the lifeworld, the second concerning the paradoxes contained in the Krisis regarding the possibility to attain a new foundation of transcendental phenomenology. Both issues must be taken into consideration before we question the possibility of a science of the lifeworld.