According to United Nation estimates, 27 million people are currently enslaved across the globe. With an imperative message, humanitarian photographer Lisa Kristine will share images from her travels documenting some of their daily realities. Lisa Kristine uses photography to expose deeply human stories. If you missed her TED Talk, now is the time to hear and see her poignant photographs.

Location: Commonwealth Club of CA; 595 Market St. (2nd floor); San Francisco

Time: 5:30 p.m. networking reception, 6 p.m. program, 7 p.m. book signing

Cost: $20 non-members, $8 members, $7 students (with valid ID)