Kenneth Robert Stacey Morris was born on 23 Feb 1901 in Cornwall, England. He was educated at Blundell's School in Tiverton, Newton College in Newton Abbott, and later in his life studied at the Royal College of Science and the Imperial College of Science and Technology. After teaching for a short period at Bedales School (1924-1926), he returned to his own studies and obtained a BSc in Biology in 1928. Later in that year, he joined the Colonial Service and was appointed Assistant Entomologist at the Medical Research Institute in the Gold Coast (Ghana), Africa. He spent much of his time studying the life-cycle and habitat of the tsetse fly, a subject that occupied the majority of his working life in Africa.

In 1931, Morris returned to England, and in 1932 he started work at the Parasite Laboratory of the Institute of Entomology at Farnham Royal, Buckinghamshire. He remained there for four years, during which time he obtained a PhD for a thesis on the Bionomics of a Tsetse.

Morris returned to the Gold Coast (Ghana) in 1937, when he was appointed to the post of Medical Entomologist; he remained in the Gold Coast (Ghana) for 15 years while he continued his research into sleeping sickness and the tsetse fly. During this period, he obtained a DSc for a thesis on the Control of Trypanosomiasis (1946). He also formed the Gold Coast Department of Tsetse Control (1949) and was Director of this Department until 1952, at which point he retired from the Colonial Service.

On his retirement from the Colonial Service, Morris formed an ecological research station for Nature Conservancy at Grange-over-Sands in Cumbria, England; he was Director of this research station until 1955. Morris' next appointment was back in Africa, where he worked for the East African Trypanosomiasis Research Organisation (EATRO) in Uganda and other East African countries, including Sudan and Kenya (1955-1958). Between 1956 and 1960, he also carried out research in Liberia for the American Foundation for Tropical Medicine. In 1961, he became a Leverhulme Research Fellow in the Department of Pathology at Makerere College Medical School. Morris retired to New Zealand, where he became a broadcaster, journalist, and lecturer. He died in Apr 1980.

He married his wife Marjory in Sep 1940, and they worked closely together for some years in the Gold Coast (Ghana).