Unions tend amalgamate in much the way companies acquire. In Britain we've had, and still have, some quite powerful unions that formed from smaller groups in t

Unions tend amalgamate in much the way companies acquire. In Britain we've had, and still have, some quite powerful unions that formed from smaller groups in the 1970s, notably the Transport and General Workers' Union [0]. Also, unions naturally cooperate and support each other forming a formidable power bloc. My 1980s memories are of Flying Pickets and Solidarity. Indeed, in Poland, Lech Walesa's Solidarity [1] was arguably a key domino in the events leading to the overthrow of communism in East Europe. [0] https://en.wikipedia.org/wiki/Transport_and_General_Workers%27_Union https://en.wikipedia.org/wiki/Transport_and_General_Workers%... [1] https://www.britannica.com/biography/Lech-Walesa https://www.britannica.com/biography/Lech-Walesa