Europe’s experiencing the longest hot war since World War II. The war in the Gulf seems to be escalating as we speak. Extremism has been on the rise for years now. Is it actually getting worse or is it simply the fact that we can access information from all four corners of the world so easily as never before?
It’s not that it’s more volatile, but that the volatility is coming closer to home (and 24 hour news amplifies it).
South America is at its most peaceful in about 100 years, South East Asia currently only has 1 war ongoing, while slightly up from 0 in 2010, is still lower than most of the last 100 years.
Africa is more stable overall and developing better for most people, with some exceptions.
Although if you mean volatile as “the US is no longer sure it can curbstomp any likely military opposition”, then yes. That is now true due to other nations’ improvement, and changes to asymmetrical warfare capabilities.