His most notable science fiction works are a series of novels, the Pelbar Cycle, set in
North America about a thousand years after a "time of fire", in which the world was nearly totally depopulated. The novels track a gradual reconnection of the human cultures which developed. Much of the action takes place in the communities of the Pelbar, along the
Upper Mississippi River — in the general vicinity of Elsah. Several cultures, including the matriarchal Pelbar, join together in the Heart River Federation. Others, especially the tyrannical Tantal and slave-raiding Tusco, fall apart after suffering defeats. The predominant characters are change agents: Tor, Jestak, Stel and his wife Ahroe Westrun. All are Pelbar except for Tor who is Shumai. Williams won the
John W. Campbell Award for Best New Writer in Science Fiction in 1983. He is also known as a writer of
haiku,
senryū, and
tanka, and wrote a number of essays on the haiku form in English. In a 1975 essay, he coined the term "Tontoism" to refer to the practice of writing haiku with missing
articles ("the", "a", or "an"), which he claimed made the haiku sound like the stunted English of the Indian sidekick,
Tonto, in the
Lone Ranger radio and television series. In 2001, his best essays were collected in
The Nick of Time: Essays on Haiku Aesthetics, edited by Lee Gurga and Michael Dylan Welch. Williams was the president of the
Haiku Society of America (1999) and vice president of the Tanka Society of America (2000). In 1989 he won the Museum of Haiku Literature Award from the Haiku Society of America with this poem written for
Nick Virgilio shortly after Nick's death: Williams died from an
aortic dissection on June 2, 2009. ==Selected works==