Want to end bad wars? Fight the good war. Disciple the nations under the Prince of Peace.
When the church does not fight the good war, the fighting impulse is perverted into bad wars. When the church mishandles money, and does not teach members how to handle money Biblicaly, we are given civil governments that mishandle money. When the church does not believe, teach, confess, and act according to the Biblical standards of marriage, neither, then does the civil society.
A wise one has said: Sung liturgy (CH: You sing to those you love), the same prayers every week, chant the war songs of the Prince of Peace.