The twenty-four hour news cycle tends to leave the impression that warfare is more widespread than ever - that impression is incorrect. It has actually been declining. Violence not classed as warfare is another matter, for example the cartel violence in Mexico or the many murders in Chicago and Baltimore.
The Strategy Page website does a long, comprehensive look at where warfare still occurs around the globe as 2019 ends. There are places where little progress is seen, including Somalia, Sudan (north and south), Yemen, Nigeria, and other areas where tribalism persists as the overriding local power structure.
This review is a useful resource for where we stand currently in defusing warfare. I recommend it with the caveat that it wasn’t proofread skillfully.