Even in countries that allow citizens to possess weapons, the number of deaths in the United States per 100,000 people is an anomaly. The correlation between the number of guns in a society and the number of gun-related deaths is clearly shown in this chart:
According to Pew Research, 80% of 'Mericans who identify as Democratic voters and 54% of Republican voters support a ban on assault weapons. The support is there, but its the captured politicians who get in the way of effective gun control that saves lives. Too late for the 59 victims in Las Vegas, the deadliest mass shooting incident in America's violent history.