If you could go back in time what would you change?

Some people might want to go back in time to change their childhoods, or to live their lives differently. Here are some examples of what people might change if they could go back in time: Childhood: Some people might stand up to bullies, or take music or other arts more seriously. World: Some people might try to change how people treat each other, making them more accepting of differences. Others might try to make travel easier, cheaper, and more environmentally friendly. However, according to Wikipedia, the Novikov self-consistency principle states that any actions taken by a time traveler are part of history, and therefore it's impossible to change history. I think it is best if we learn from our past, rather than trying to change it.