As well as farmed fish, mushrooms are a high protein food source easily cultivated in large quantities indoors.
(image by Lucky via unsplash)
Some of the most intelligent people have ever known never attended uni. Knew a gentleman in his seventies that never went to school but the way he handled horses, his softly spoken manner and eloquence was mesmerising. Any wild brumby he could be riding within an afternoon. His spotless cotton shirt always without a crinkle.
Some people that never learnt to read books can tell some of the best stories have ever heard, and can read other things exceptionally well.
Intelligence comes in many forms.
Filling out forms is not much of a skill bureaucrats. Any medications delivered on schedule to others yet. Hows the reducing destroying all life on earth coal use going. Integrity would be preferred.