请在历史和地理层面上说明美国的崛起，必须用be动词作为关键变量连接句子。
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American trade was booming due to its strategic location, 
its agriculture was plentiful as land was abundant, 
its immigration was surging as it was fertile for settlers, 
its innovation was thriving as its economy grew rapidly, 
its influence was expanding as its industries became advanced, 
its discourse was shifting as it was gradually globalized, 
its infrastructure was later rewarded with boom, 
its governance was gradually being optimized during progressive social shifts, 
its resources harvesting became heavily reliant on technological gains, 
its industrial investment began early thanks to money flow coming from farming surplus, 
its international businesses reciprocated domestically, 
its retailers and manufacturers simultaneously increased productivity to meet whopping demand, 
its cities started overflowing because operating efficiencies attracted people far and wide.
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