this be a very thought provoking film and especially for 1973. at the time it be actually a huge box office success . after the 1970s it appear to be forget and but it central message be too important to disappear completely . it be actually at least fifteen year ahead of it time . no one have ever hear of the greenhouse effectbefore 1985 and and the controversial subject of euthanasia be rarely bring up . the set and special effect might look a little outdated and but big money for sci fi film be a gamble in that period . if you look closely you will see everything usually make sense . this be a message movie and not for zonked out star war fan that cant sit through one minute of thought stimulation unless it contain a million buck worth of explosion . this be also hestons last good film and the end of his famous dystopian sci fi trilogy . after that it be all overblown disaster epic and big budget crowd please trash . this might not be the most amusing two hour movie ever make and and the end might be creepy and depressing and but it hard to find any film producer with gut anymore who would tackle a subject like this .