In the late 20th-early 21st Centuries , Henley 's most well-known poem " Invictus " has been cited a number of times in post-event statements by Libertarian and Ethno-Nationalist revolutionaries who have engaged in violent politically motivated public acts , as an explanation/justification for their actions , including Timothy McVeigh , an American citizen who attacked the Government of the United States with a bombing attack in 1995 , and Brenton Tarrant , an Australian who committed a massacre at two mosques in Christchurch , New Zealand on 15 March 2019
massacre
Christchurch mosque shootings
William Ernest Henley