I think that as an individual and as individuals in general, if we can't leave the earth feeling like we left something that someone in the future can use then I don't feel like we've served our purpose on this earth in an effective manner.
My parents split up when I was five, and that changed my life as well. I wasn't used to seeing them away from each other. I had to get used to seeing my dad without my mom. Those things affected the music that I make.