Emil dragging Alfred through a howling blizzard to the doctor's house to save his life. Even the villagers who have previously disapproved of him for all his pranks hail him as a hero after this instance.
Astrid Lindgren was very involved in politics; after being forced to pay 102% of her income in taxes she debated the minister for finance, accused him of gaming the system (which he had designed), dared him to switch jobs with her, and wrote a public letter describing herself as "formerly a social democrat, now only a democrat." The social democratic party of Sweden lost the election for the first time in 40 years after that (although it probably helped that Ingmar Bergman had felt forced to flee the country due the same taxation laws). In an attempt to mend the partys relationship with the countrys most beloved author, they gave her an animal protection law as a present on her 80th birthday. What other children's books author has caused a party to lose an election and received a law as a present?