I assume the following should be considered as pillars of motivation. All of them should be necessary for a person to be motivated doing something. All of them should surround person, interact with him.
Person who is better than me. He shows me that result of work is possible if I will work hard and will become as good as he is.
Person, who is worse than me (from the point of view of qualification). He shows, that I have a preference in comparison to others to start doing something. I have a potential.
Person having unresolved problem. And result of my work could help him. He can buy result of my work. He needs it.
Thus, in other terms, we can list pillars like this:
Imagine future world, different from that we have today. Future of child is no longer defined by history of his parents. Children are born and distributed randomly among parents in all over the world. Each parent educates random child. No ownership, no maternity. Just process of education. Each parent should educate 1 random child minimum.
Btw, I do not share this idea in real life and I would like to be parent for my child. However, this could be a good idea for scenario of a fantastic book.