Who is Edmund Dene (E.D.) Morel from King Leopold's Ghost and what is their importance?

E. D. Morel (1873 - 1924) was a British journalist, author of fifteen books and countless articles, and human rights activist, who led a campaign against African slavery with a special focus on atrocities perpetrated in the Congo. He founded, and was the editor and major contributor, the West African Mail, a periodical focusing on African human rights issues. During World War I, Morel espoused pacifism and served a six month term in Pentonville Prison for exporting anti-war material to a neutral country. Morel later entered politics, defeating Winston Churchill in his successful 1922 bid as a Labour candidate. Re-elected in 1924, Morel served little of his second term before succumbing to a heart attack.