I used to believe this as a JW until I saw the movie Gladiator with Russel Crowe, that was definitely one of my aha moments. To think that the main entertainment for the seat of civilization at the time (Rome) was to come together, and watch people and animals hacking and tearing each other to pieces, it really made me re-think my beliefs.
Also if I recall correctly, from the mid nineties until now violent crime world wide has decreased exponetially. I attribute much of this to better education, video games, and porn. To be fair, bad things have always happened, and will continue to happen for the forseeable future but no one can factually deny that things have improved.