Not OP, but why not geopolitics? It's like thinking how your village's future will look like, but in a planet level...
For example the Iraq war quagmire has lead to Al-Qaida and ISIS (well, forest fires in Russia also caused grain harvests in Russia to suffer, food prices to go up, and the Arab Spring to happen), this has lead to the refugee crisis in Europe, that combined with austerity has lead to the rise of populism in Europe, and Brexit.
For example the Iraq war quagmire has lead to Al-Qaida and ISIS (well, forest fires in Russia also caused grain harvests in Russia to suffer, food prices to go up, and the Arab Spring to happen), this has lead to the refugee crisis in Europe, that combined with austerity has lead to the rise of populism in Europe, and Brexit.