Even with the interconnectedness of industry, wherein an improvement in one area led to improvements in other areas, there was one dual foundation on which the rest was built; that foundation was:.

There was one dual foundation on which the rest was built; that foundation was: Speed and steam.

Explanation:

Industry was most beneficieted with the notions of speed, and the invention of steam. This dual foundation was the reason why industry could developed faster and also promoted transportation.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.