Complex sentence: The failure of the NAC to prevent this caused its collapse until it was revived not long afterwards by a younger and more militant generation which, ultimately, invited Hastings Banda to return to the country and lead it to independence.
Split into simpler sentences: The failure of the NAC to prevent this caused its collapse. It was revived not long afterwards by a younger and more militant generation which, ultimately, invited Hastings Banda to return to the country and lead it to independence.