US pulled ahead of the rest of the world in STEM during the wars. The brain drain of scientists fleeing Europe - exemplified by Einstein and Von Neumann joining

US pulled ahead of the rest of the world in STEM during the wars. The brain drain of scientists fleeing Europe - exemplified by Einstein and Von Neumann joining IAS in Princeton - set up US in a dominant position that has only gotten stronger over time. So it will take some time to lose that lead, and there will be push back from the immediate beneficiaries: DoD, national science labs, Tech sector. In fact some drastic parts of the recent immigration restriction plans were removed due to pressure from tech CEOs. In the meantime this is a golden opportunity for Canada. Toronto and Montreal already have world-class CS research cluster which they can build on, and attract scientists frustrated with anti-immigrant sentiments in the US and EU.