In this lesson, we explored the concept of heroes, particularly focusing on self-sacrifice for the greater good. Using examples from popular culture, such as Iron Man from the Avengers, we discussed how individuals might risk their lives to save others. Historical examples, like first responders and victims of events like the Chernobyl disaster, illustrate real-life acts of bravery and sacrifice. Ultimately, the discussion emphasized the importance and impact of those who put others before themselves in times of crisis.