In what ways was the ocean valuable to economies in the northern colonies?

The ocean was in many ways valuable to the Northern colonies. For instance the good harbors served them well in trading and merchandising. The ships could travel carrying merchandise to Philadelphia and some other parts. As the tradition of slavery was also a booming tradition in those time, the ocean helped transport them as well, building of ships was another benefit the ocean gave them.  

the federal constitution of the united mexican states of 1824 was enacted on october 4 of 1824, after the overthrow of the mexican empire of agustin de iturbide. in the new constitution, the republic took the name of of united mexican states. it was replaced by the federal constitution of the united mexican states in 1857.

besides the fact that abraham lincoln abolished slavery, and greatly benefit black people, he had a heavy impact of the definition of what democracy was, and should be.