I think they are the rise of China and its much more aggressive foreign and defence policy, the advent of significant cyber-attacks against Canada and all our western allies, and what Russia is doing in Ukraine. A lot of people question whether we should be supporting Ukraine, but there but for the grace of God go any number of other countries.
I think those are the main ones: China, Russia, the rise of cyber and just generally the disaggregation, the less forceful leadership of the United States, which actually held us together after the Cold War.