Answer :
On of the main drivers behind the decrease in violence across societies is the spread of constitutional state.
The rationale behind the existence of armed forces is that soldiers use guns as a peaceful instrument and stability. It should be noted that a state who fails to do so can drag down a whole region into chaos and conflict .
Peter van Uhm choose a gun as an instrument for peace
The motivating goal for joining a military is to serve the country.
Why is there less violence in different societies?
According to Harvard professor Steven Pinker, the growth of constitutional states and forms of government has resulted in a decrease in violence across all social classes.
Since most countries are now controlled by constitutions, society is more ordered and there are nonviolent ways to resolve conflicts, which has led to a decrease in violence.
Learn more on constitutional state:
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