
The Grandfather Paradox is a thought experiment about time travel and paradoxes. It was the plot point of the first Back II The Future film. If you went back in time and killed your grandfather, you would erase yourself from your family’s timeline. So, how could you do this if you don’t exist in the first place? Let’s take it a step further and discuss the ethics of execution. Imagine you have a time machine. You have the chance to go back in time and smother Hitler in the crib. Would you do it? This premise is a major plot point in Rick Remender and Jerome Opena’s Uncanny X-Force.
Substitute Hitler with Idi Amin, Saddam Hussein, Stalin, or Mao Zedong. Due to political persecution, forced labor, botched political policies, and executions, Mao may be responsible for 55 million deaths; no one knows for sure.