Geopolitics has seen massive impact since then. For example, the rise of ISIS is a direct descendant of the Iraq war which is a direct consequence of corrupt and criminal decision making by the Bush/Cheney admin in response to 9/11.
Debatable if the Arab Spring would have occurred without it, as the Middle East might have been much more stable.
Hear hear. And war refugees entering Europe is causing right-wing populism to rise (not that years of stupid austerity polcies was helping).
Would Brexit have happened without 9/11?
There's an ancient TIME article I have in my archives highlighting how the Dubya admin ignored Clinton's intelligence team's attempts to hand over info about the threat of a terrorist attack in the US. Would 9/11 have been prevented if Gore had won 2000? God damn hanging chads and rigged elections...
Debatable if the Arab Spring would have occurred without it, as the Middle East might have been much more stable.