Type “God” into Google and you’ll get nearly 2 billion search results. God even has His (or Her) own (unverified) Twitter feed. But despite the sophisticated arguments postulated by believers and non-believers, God’s existence remains in dispute. For Penn’s 2012-13 “Year of Proof,” the Rare Book & Manuscript Library presents “Resolved? God Does Not Exist,” a small exhibition selected from the Library’s primary source collections that shows examples of individual works that attempt to prove or disprove the existence of God. The exhibit, which runs through Feb. 24, 2013, is on display on the first floor of the Van Pelt-Dietrich Library Center, 3420 Walnut St, next to the Information Desk. For more information, call 215-898-7088 or email rbml@pobox.upenn.edu.

Attend the opening night of “Jeremy Deller: Joy in People,” the first mid-career survey of this unpredictable and vibrant artist. The exhibit features almost all of Deller’s major works to date, including installations, photographs, videos, performance works, and sound pieces. Institute of Contemporary Art, 118 S. 36th St. Info: 215-898-7108 or www.icaphila.org. The exhibit is on display through Dec. 30.

Immanuel Wallerstein, senior research scholar in sociology at Yale University delivers the Dr. S.T. Lee Distinguished Lecture in the Humanities, “Cores and Peripheries in the 21st Century.” Widely considered one of the most influential economic and historical materialists of the modern world, Wallerstein addresses both the continuing relevance and the limitations of the world systems model. This is part of the 2012-13 Penn Humanities Forum on Peripheries. Rainey Auditorium, Penn Museum, 3260 South St. Info: 215-573-8280 or humanities.sas.upenn.edu.