Many European countries had what was referred to as a "Sphere of Influence" in China at this time. So, Secretary of State, John Hay, created an open door policy to allow all countries equal privileges in trade.
<span>Increased as a way to improve one's own economic and social opportunities.</span>
It happened because the consuls only cared about their own personal wealth and not for the people. The senate got richer and richer while the people got poorer and poorer. It ended with the rise of the Empire and the rule of an Emperor. The disadvantage was that all of the power was in the hand of a single person and often the Roman emperors were tyrannical.
The confederation helped the century evolve
Answer: Because they had never developed immunities to the disease
