This is kind of a let-me-google-that-for-you situation, but the nickel explanation is that Zamenhof saw a culturally-neutral international language as being imp

This is kind of a let-me-google-that-for-you situation, but the nickel explanation is that Zamenhof saw a culturally-neutral international language as being important for building peace, furthering humanism and combating nationalism. If you look at the historical context, it makes more sense. Most of the criticism aimed at Esperanto today is about how badly executed the language itself is, but it unquestionably got further towards the larger goals than any other constructed language.