Answer:
The phrase "Blessed are the peacemakers" is among the beatitudes in the Bible, in the book of Matthew chapter 5 verse 9 which means that he that makes peace instead of war shall be blessed.
A ruler might want to include it in a coat of arms because he knows the importance of peace and wants to encourage the people to embrace peace instead of war.
Carelessly/ careless / carelessness
Central message is what's the point of war. With that in mind I'll let you do your homework.
Not sure of second one maybe both
Plz mark me brainliest!
Hope this helps!