Language might have been the major factor in human development. But now language is the biggest barrier to human progress.
Language is an encyclopaedia of ignorance.
Every word in language has come in at a relative stage of ignorance. That concept, perception of 'lump' of experience is frozen into permanence as a word. Creating new words for the needed concepts is immensely difficult. So, as in any self-organising system, we are bogged down in a local equilibrium and cannot move forward. That is why I have been working on a new language for human thinking.