Answer:
My answer won't be perfect since I don't know what reading you did but this was my take on it:
One person can make a large difference in the pool of human rights. Take, for example, the right that all men (and women) are created equally. One person can defend and upkeep this right by treating everyone equally; with respect and kindness. One could also step up for others if they feel as if they are not receiving equal treatment. Personally, I have witness, in the grand scheme we call life, a fair share of hatred and prejudice (in real life and on social media) but I have always seen that hatred and prejudice overcome by an overwhelming amount of love. The calling to stand up for others is precisely what has defended human rights of all people; and it's exactly what will continue to defend human rights for all.