The answer is <em>The Assembly Line</em><em />
Henry Ford had already changed the world by his creation of the ever-growing Ford Motor Company, but when he was given a way to increase production from one car every 12 hours, to one car every 93 minutes, his company started booming. Originally the Model T car sold for around $850 (around $20,000 in today's money), but after Ford's use of the assembly line, he was able to get the price down to $260 (around $6,000 in today's money). So, as you can see, the use of the assembly line indeed had a drastic effect on Henry Ford's production of the Model T automobiles.
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The Empire of Rome dominated most of Europe and much of Africa and the Middle East. What is often overlooked though is the key role Rome's geography played in it's rise to power. There were two mountain ranges, the Alps and the Apennines protected Rome from invasion because it acted as a natural barrier to prevent armies from invading in those areas. This also forced enemies to push through narrow passages, allowing time for Rome to set up and defend. The fertile land in Rome also allowed for extensive amounts of agriculture. It is often cited that the soil in Rome is some of the most fertile soil in Europe. Finally Rome benefited from it position, allowing to become a center for trade. Rome was positioned in the center of the Mediterranean Sea, which made Rome a very desirable place for trade, even before Rome rose to power. All in all Rome's natural barriers, fertile land, and central location played a key role in its rise to power.
This event would be Germany's sinking of an American vessel despite both nations being at a neutral diplomatic standpoint at the time. When the Germans sank the American vessel, without any actual reason to do so, this drastically coldened the relationship between the US and Germany.
<span>Recently, there are less and less unions being established; those in place today have been running for years, some even decades. Nowadays, it's easier and cheaper for companies to outsource their work or maintain cheaper workers because of greater government welfare programs. Public Works Associations are good quality jobs that maintain healthcare programs and retirement savings for their employees that not all employed individuals have the opportunity for, mostly because these high quality jobs are scarce.</span>