Day After Tomorrow, by Mack Reynolds (epub/Kindle/pdf)
"The time is the future. The government is a corrupt and inefficient bureaucracy, mainly concerned with protecting the profits of large corporations. The Movement is a new and non-violent revolutionary group seeking to replace the political mess with a just and scientifically efficient socioeconomic system. The Movement was staffed by some of the world's greatest intellectuals and scientists; unfortunately, they were amateurs in the business of revolution.
The government could call on an army of ruthless professional agents -- and they had no scruples about using violence."