Currently touring several cities in the U.S., The Happy Show by graphic designer Stefan Sagmeister, blurs the boundaries between art and graphic design with a great mix of installations, imaginative typographical displays, and interactive artworks. The large exhibition is punctuated with social data gathered from Harvard psychologists Daniel Gilbert and Steven Pinker, anthropologist Donald Symons, psychologist Jonathan Haidt, as well as several prominent historians. There’s also free gum…