Dan Heath, a writer and researcher, delves into proactive problem-solving methods from his book 'Upstream,' emphasizing the importance of addressing root causes, like changing your car's oil to prevent future issues. Leidy Klotz, a professor at the University of Virginia and author of 'Subtract,' advocates for the power of subtraction in problem-solving. He argues that simplifying by removing unnecessary elements can lead to clearer solutions, contrasting our instinct to add more. Together, they explore how changing our mindset can transform both personal and societal challenges.