In general, yes, immigration during 1830s to 1840s was vital to the industrialization of America, since it was mostly immigrants who first sought employment in the factories that were an essential element of industrialization.
The program that was created as a part of the "Great Society", provides hospital insurance for Americans age 65 or older is Medicare.
Prior to the conflict between Britain and its North American colonies, the colonies were able to manage majority of its own affairs without Britain's interference. However, when Britain started implementing stricter measures on their colonies' trade and other affairs, the colonies didn't like it. This started the tension between both parties.