von Ahm sounds like a great entrepreneur. I really admire those that dedicate themselves to society. I absolutely agree that free education can change the world; some of the world’s biggest problems could be solved if more people were educated. von Ahm seems like a very humble individual. He graduated from prestigious institutions, made a lot of money from selling reCAPTCHA, and yet remains on the teaching staff and develops open education. He must spend every waking moment working – juggling teaching, research, and Duolingo.