In February 1950, Hooper's competitor A. C. Nielsen bought out the Hooperatings system. DuMont did not fare well with the change: none of its shows appeared on Nielsen's annual top 20 lists of the most popular series. One of the DuMont Network's biggest hits of the 1950s, "Life is Worth Living", did receive Nielsen ratings of up to 11.1, meaning that they attracted more than 10 million viewers. Sheen's one-man program – in which he discussed philosophy, psychology and other fields of thought from a Christian perspective – was the most widely viewed religious series in the history of television. 169 local television stations aired "Life", and for three years the program competed successfully against NBC's popular "The Milton Berle Show". The ABC and CBS programs that aired in the same timeslot were canceled.