The correct answer is - remained a political movement. The Solidarity labor union continued its existence and remained a thorn in the eyes of the leading political parties, by constant monitoring of the situation in the market and labor, they very often made protests and occasionally riots, especially where the prices of the most important products were going up.
By birth? i think? do you mean like how did they get in a certain caste? because then it would be by birth. but if you mean like what were the castes, i forget.
