Conway's Law seem like a specifically social instance of Nietzsche's Beyond Good and Evil aphorism #6: https://en.wikiquote.org/wiki/Beyond_Good_and_Evil

> Gradually it has become clear to me what every great philosophy has been: namely, the personal confession of its author and a kind of involuntary and unconscious memoir; also that the moral (or immoral) intentions in every philosophy constituted the real germ of life from which the whole plant has grown.

I originally came upon this quote in the context of a comparison of personality theories (Dave Kelly, Ptypes).