The Missouri Compromise of 1820 was an attempt by The U.S Federal Government to maintain balance between states that allowed slavery and those that did not. Missouri was allowed to become a part of the Union as a state that allowed slavery while Maine changed its status to being a non-slave state. This Allowed the country to keep an equal number of slave having and not slave having states.
The International Ladies Garment Workers Union.
Not only did this group grow larger after this tragic event, but the fire acted as a catalyst for more labor unions to protect the rights of workers, especially those in factories.
Because of scale I am pretty sure
The part of the economy of which that has rose and has accelerated the decline of organized labor is the SERVICE SECTOR. This is also known as the tertiary sector among the other sectors. This is also the sector that provides direct services to the consumers. Hope this helps.