I apply the principle of event-symmetry to simple string models and discuss how these lead to the conviction that multiple quantization is linked to dimension. It may be that string theory has to be formulated in the absence of space-time, which will then emerge as a derived property of the dynamics. Another interpretation of the event-symmetric approach which embodies this is that instantons are fundamental. Just as solitons may be dual to fundamental particles, instantons may be dual to space-time events. Event-symmetry is then dual to instanton statistics. In that case a unification between particle statistics and gauge symmetry follows on naturally from the principle of event-symmetry. I build algebras which represent symmetries of superstring theories extending event-symmetry, but which are also isomorphic to an algebra of creation and annihilation operators for strings of fermionic partons.