His Amharic plays focus mainly on contemporary Ethiopia, particularly the plight of young people in urban settings and the need to respect traditional morality, as in Crown of Thorns (1959). Oda Oak Oracle (1965), which is said to be his best-known verse play written in English, is based on Ethiopian history and focuses on religious conflict.

Later in the 1960s, he decided to write about the common man, rather than religion and royalty, and this marked the beginning of modern Ethiopian theatre.

As a poet, Tsegyaye published several poems, mostly on subjects related to war and peace, having had a father who fought for his country during the Italian occupation. His English poetry appeared in Ethiopian journals and was included in several anthologies of African poetry, including New Sum of Poetry from the Negro World (1966).

In 2002, the newly formed African Union even adopted one of his poems as its anthem. The poet and playwright, who founded Addis Ababa University’s theatre department, was also a celebrated human rights activist who also promoted Ethiopian culture during his travels. He won a variety of awards, including the Human Rights Watch Free Expression award in New York in 1982 and the Honorable Poets Laureate Golden Laurel Award given by the Congress of World Poets.

But his achievements did not come without difficulties. His career covered three major regimes: Emperor Haile Selassie I’s rule, Mengistu Hailemariam’s dictatorship, and former rebel leader Meles Zenawi, who ruled Ethiopia for more than 20 years.

All the three regimes banned his plays. He once indicated that of 49 works, about 36 had at one time or another been censored. The acclaimed Ethiopian playwright who was also the country’s poet laureate died February 25, 2006, in New York, U.S. after moving there to receive treatment for kidney disease.