Archbishop Luwum was a leading voice in criticising the excesses of the Idi Amin regime in Uganda that assumed power in 1971. In 1977, Archbishop Luwum delivered a note of protest to dictator Idi Amin against the policies of arbitrary killings and unexplained disappearances. Shortly afterwards the archbishop and other leading churchmen were accused of treason. He was killed in 1977 and is now considered a martyr by the Anglican Communion.

God of truth,
whose servant Janani Luwum walked in the light,
and in his death defied the powers of darkness:
free us from fear of those who kill the body,
that we too may walk as children of light,
through him who overcame darkness by the power of the cross,
Jesus Christ your Son our Lord.