Stoicism has made its impact through the centuries. Great leaders have turned to the rational mindset espoused by the third century philosopher Zeno of Citium as a means of controlling their emotions. However, according to a new book by philosopher William B. Irvine, Stoicism has much to offer twenty-first century seekers of tranquility. And it's not all seriousness. WFIU's Adam Schwartz spoke with Irvine who explains his theory in A Guide to the Good Life: The Art of Stoic Joy.