When people talk about traveling to the past, they worry about radically changing the present by doing something small, but barely any people really believe that they can radically change the future by doing something small.
God grants you a chance to bring back a former football legend that has retired/died to play for your country's national team in the 2022 World Cup (assume he is in his former prime). Who will you bring back? How far does your country get in the World Cup?
It is the year 2137 and the world's supplies are shortening. You are pitted against the rest of the world for 24 hours in Reddit, and only the top 1% with the most karma by the end of 24 hours will survive. What would be your strategy to make it to the one percent?