or a shoe installer. Stick your feet out one by one, and it will put on a shoe each time. (perfect for next to the front door)
Honestly all of these are incredibly interesting. Have you thought much about the implementation for each? The shoe installer is something I see being fairly tricky. Which one of these would you want to see first?
Ethics in political decisions.
A Pill for the ultra greedy rich people. When they take it, then their greedyness, will get cured. Same for empathie to other humans, animals, nature itself.
The rest of world problems, should be fixed then with these 3 solutions :)
What are your thoughts on communism as defined in, say, The Conquest of Bread, by Petr Kropotkin?