Sorokin Index for Political disturbance
We digitalized the data provided by Sorokin Vol 3 1937 on political instability. Some computational error have been corrected and some minor difference relative to the computation of the geometric mean remain. In particular, we translated the index for Size of the Mass involved and the Intensity into the index used to compute the aggregate component that enter into the computation of the Instability Index according to the table above. Despite those changes, the wide majority of the data has been untouched. We recommend however to use those data for long term analysis rather than for few or a singular event.
A complete description and discussion of this index can be fine in the extract of the Sorokin book below as well as the table of translation for column E and F.

France
France instability’s data collected from Sorokin Vol 3 1937.
Italy
Italy instability’s data collected from Sorokin Vol 3 1937.
Netherland
Netherland instability’s data collected from Sorokin Vol 3 1937.