I think you have to look to history for the repeated, seemingly inevitable recurrence of eventual conflict after decline or degradation of internal, or external political relations/interests/material conditions whatever. And what does game theory tell you to do in an inevitable situation w/ potential defectors/non-cooperators?
My answer is only an appreciation for "realism" or "realpolitik" in these matters, that people should not delude themselves at the point when enemies distinguish themselves to you by pattern of action and behavior over time. But you should always work for cooperation where possible of course. "Make friends" (where you can).
I'm mostly responding the point that seems to imply political differences can always be overcome, that everyone is always willingly persuadable, and that science and tech or any institutions for that matter can exist in a vacuum outside of politics. People just don't notice or think about political conflict when they are operating amongst political allies or issues don't rise to level of existential disagreement.