What are the motifs in The Wanting Seed by Anthony Burgess?

The saving grace from the tribulations in this novel is procreative love. This is ironic, considering that the problems in the story stem from global overpopulation. Yet the blight that destroys crops and fishes, leaving humans with virtually nothing to eat aside from each other, is seen by the author as having arisen from the repression of heterosexual love. What he means is that the balance of nature has been powerfully damaged by attempts to control overpopulation through repression of the fundamental urge of the species, which is to reproduce.