  In this paper we present a fixed point property for amenable hypergroups
which is analogous to Rickert's fixed point theorem for semigroups. It equates
the existence of a left invariant mean on the space of weakly right uniformly
continuous functions to the existence of a fixed point for any action of the
hypergroup. Using this fixed point property, a certain class of hypergroups are
shown to have a left Haar measure.
