The writing and amendment of constitutions does seem to correlate with the importance of conscription. The French adopted their first constitution and the "leve

The writing and amendment of constitutions does seem to correlate with the importance of conscription. The French adopted their first constitution and the "levee en masse" in quick succession. The British famously avoided conscription as hard as they could, up to the point of going into WW1 with an all-volunteer army; and they also avoided a written constitution. Israel, still relying heavily on conscription, made significant changes to its basic laws as recently as 2018. As for the US, the longer gaps in amending the constitution: 1804-1865, 1870-1913, 1971-present (yes the 27th was adopted in 1992 but proposed in 1789) correspond within a few years with periods of little to no conscription. This doesn't bode well for prospects of further amendment, by the way.