The "Bible Teach" book, on p.89 says:
Millions of people have been killed in wars during the past century. One British historian wrote: "The 20th century was the most murderous in recorded history...it was a century of almost unbroken war, with few and brief periods without organised and armed conflict somewhere." A report from the Worldwatch Institute states: "Three times as many people fell victim to war in [the 20th] century as in all the wars from the first century AD to 1899." More that 100 million people have died as a result of wars since 1914. Even if we know the sorrow of losing one loved one in warfare, we can only imagine such misery and pain multiplied millions of times over.
What do you say? Was the 20th century the start of the bloodiest period in human history? Is there something left out of the picture here by the WTS?