New technology leads to bigger cities in the 1800s, the united states was still a very young nation, trying to solidify its identity. the industrial revolution began in great britain, a fast development of society following the introduction of machines. the united states was slower than great britain to fully embrace the changes. yet key technological developments caused a rapid growth in american urban areas. which sentence from the introduction paragraph serves as the author's thesis? (thats not the whole article just the introduction paragraph.) i need someones ! and !