(noun) A political upheaval in a government or nation state characterized by great change.
"Poverty is the parent of revolution and crime."
"Those who have committed no faults want no pardon. We are only defending what we deem our indisputable rights."
"Beauty, no doubt, does not make revolutions. But a day will come when revolutions will have need of beauty."
"This I want to believe implicitly: Man was born for love and revolution."
"If the cause is advanced, indifferent is it to me where or in what quarter it happens."
"A true revolution of values will soon cause us to question the fairness and justice of many of our past and present policies."