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It's easy to feel overwhelmed by the world's problems. It's harder to pinpoint the systems responsible for creating them. In this series, Jon Stewart brings together people impacted by different parts of a problem to discuss how we come up with change.

The Ed Sullivan Show is an American TV variety show that originally ran on CBS from Sunday June 20, 1948 to Sunday June 6, 1971, and was hosted by New York entertainment columnist Ed Sullivan. It was replaced in September 1971 by the CBS Sunday Night Movie, which ran only one season and was eventually replaced by other shows. In 2002, The Ed Sullivan Show was ranked #15 on TV Guide's 50 Greatest TV Shows of All Time.

Host Zach Galifianakis conducts comical celebrity interviews sitting with his guests between two potted ferns on a sparse set, in the awkward style of low-budget community access cable channels.

These half-hour specials showcased some of the best up-and-coming comedians of the moment. The show was a pivotal stepping stone for many of today's stand-up stars.