On the eve of World War I, there were two million Armenians in the declining Ottoman Empire. By 1922, there were fewer than 400,000. The others — some 1.5 million — were killed in what historians consider a genocide.As David Fromkin put it in his widely praised history of World War I and its aftermath, “A Peace to End All Peace”: “Rape and beating were commonplace. Those who were not killed at once were driven through mountains and deserts without food, drink or shelter. Hundreds of thousands of Armenians eventually succumbed or were killed .”The man who invented the word “genocide”— Raphael Lemkin, a lawyer of Polish-Jewish origin — was moved to investigate the attempt to eliminate an entire people by accounts of the massacres of Armenians. He did not, however, coin the word until 1943, applying it to Nazi Germany and the Jews in a book published a year later, “Axis Rule in Occupied Europe.”But to Turks, what happened in 1915 was, at most, just one more messy piece of a very messy war that spelled the end of a once-powerful empire. They reject the conclusions of historians and the term genocide, saying there was no premeditation in the deaths, no systematic attempt to destroy a people.Indeed, in Turkey today it remains a crime — “insulting Turkishness” — to even raise the issue of what happened to the Armenians.The 100th anniversary of the Armenian Genocide will be commemorated on April 24, 2015.