Childhood’s End by Arthur C. Clarke

I re-read it a few times already, and even though written in the 50s it holds up quite well (except for the total absence of computers). Its a brilliant read. Edit: to clarify, I meant the societal trends he projected are quite fascinating. Also the transition to a post scarcity society. It’s not very prophetic obviously. :)

Why did they shave all of their hair? The photo also seems to be deliberately staged to dehumanize the detained.