I was born in, in 1950, I knew little of any works by Philosophers, until I left, and I too wish I had read them earlier in life. There was one thing I did come across though, when I was an active JW, which made me realise that Russell, Rutherford, Knorr and Franz were all pretty badly educated.
It was definition of " Higher Critics" or more accurately of Higher Criticism, which the four Big brains mentioned used to often refer to as "So-called Higher critics" as though these learned gentleman were styling themselves "Higher" as though they were better than lesser critics.
Higher Criticism is the study of the MEANING of a Text, Lower Criticism is the study of the Text purely to get a sense of the actual language, without interpretation. I am not sure that lot of poorly educated guys mentioned above actually understood what Criticism was in an Academic sense, I think at least Russell, maybe all four, thought it was the everyday use of criticism, meaning "finding fault with" that was referred to, of course it was not, it was Scholars trying honestly to get at the full meaning of Biblical texts.
I wish I had read more widely, and much earlier in life, and woken up much earlier, but at least I have made up ground academically since I left over a decade ago. I will just never get back those wasted years.