What Iām getting at is that Zamenhof not only built a linguistic object, but that behind that was an idea ā an idea of brotherhood, a pacifist idea. That strength of an ideal ā for which Esperantists were even persecuted under Nazism and Stalinism ā is still conserved by the community of Esperantists. One cannot say that it has failed, but one thing needs to be said: the reason why any language is successful is always indefinable.
Source: tatoeba (8081220)