At the end of the day, the key to happiness is taking ultimate responsibility for your reactions to all of your experiences - the good and the chaotic.
If we each take responsibility in shifting our own behavior, we can trigger the type of change that is necessary to achieve sustainability for our race or this planet. We change our planet, our environment, our humanity every day, every year, every decade, and every millennia.
Personal responsibility is not only recognizing the errors of our ways. Personal responsibility lies in our willingness and ability to correct those errors individually and collectively.