So while we are at it ask this: Has there ever been peace on our Planet Earth?:
War is defined as an active conflict that has claimed more than 1,000 lives. Of the past 3,400 years, humans have been entirely at peace for 268 of them, or just 8 percent of recorded history. At least 108 million people were killed in wars in the twentieth century.
Data is a wee bit dated (Jul 6, 2003) That means even more are dead from war as of today's date.
Now if your glass is 1/2 empty or 1/2 filled? On the plus side 108 million dead people and all the people, many of them may have made in the bedrooms, - No need to complete this as a paragraph..