Kevin Hart’s life lesson was so close to him he couldn’t avoid it. In his book, I Can’t Make This Up: Life Lessons, Kevin keeps it pretty real. “He didn’t escape any of it — jail, drugs, addictions, ruining your family to a point where my mom didn’t want me and my brother to be around him. Seeing the stuff firsthand. Seeing the reality behind drugs and addiction, and what it can really do to a person, that’s why I don’t do drugs. I learned what I shouldn’t be doing from what my dad did.” Read more here.