3. The death of scientist Henry Moseley at age 27, British scientist, in WW1.

I'm sure there are others.

1. The cancellation of the Super-Conducting Supercollider to transfer funds to the building of the ISS. Many scientists were outraged at the time and still are. It killed American's lead in particle physics.

As long as there is a super collider, US dominance really does not make much a difference.

2. The beheading of Anton Lavoisier, one of the brightest scientists of all time, by the left-wing mob in the French Revolution.

Your take is certainly an all time tragedy in Political Sceince: Anti-monarchal 18th Century thought can be compared to neither current day right and left wing thought.