The System of entitlement to credit for a breakthrough

What is the degree/extent of the decision criteria, as to who all are entitled to receive a due credit for an invention/discovery/breakthrough?

Here’s a statement – Every matter in this world is related to one another. Our actions affect the very presence of another life-form;

“..it is not uncommon for one philosopher to accuse another’s arguments of entailing solipsism as an unwanted consequence, in a kind of reductio ad absurdum..” #metaphysics