That is complete unfounded fluff words. No paper would be published if it was biased and as selective as you say. Look at the paper at least briefly and we can discuss.
I think you can download it here: https://www.researchgate.net/publication/240678278_Why_Civil_Resistance_Works_The_Strategic_Logic_of_Nonviolent_Conflict
Of interest maybe would be the indicators of a campaigns success:
The outcomes of these campaigns are identiªed as “success,” “limited success,” or “failure.” To be designated a “success,” the campaign must have met
two criteria: (1) its stated objective occurred within a reasonable period of time
(two years) from the end of the campaign; and (2) the campaign had to have a
discernible effect on the outcome.40 A “limited success” occurs when a campaign obtained signiªcant concessions (e.g., limited autonomy, local power
sharing, or a non-electoral leadership change in the case of dictatorship) although the stated objectives were not wholly achieved (i.e., territorial independence or regime change through free and fair elections).41 A campaign is
coded a “failure” if it did not meet its objectives or did not obtain signiªcant
concessions.42