My understanding of (say) WW1 was preceded by sabre rattling of various sorts. And the current shenanigans worry me.

I have seen an explanation of the Syrian civil strife by way of climate change. Basically a drought in Russia, poor harvest, no sale of wheat etc outside their borders. Poor harvests here and there including Syria. Despotic regime. People with nothing to lose. Civil unrest. And after 10 years................

Now add to that migrants overwhelming societies. More despotic regimes feeling sidelined. And two of them politically aligned. Who they gonna call?

Putin hasn't finished with the UK & US yet. Maybe the French were too savvy for him, but Marine le Pen hasn't gone away just yet.

If you dig deep enough any global situation can look scary, but it is looking scarier than ten, say, 20 years ago IMNSHO. Ultimately it will be climate that is the driver. And we ain't in control of him!