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He was commissioned by the Portuguese king to find a maritime route to the East. His success in doing so proved to be one of the more instrumental moments in the history of navigation.
The British government and people relied on their naval control and superiority to maintain control over things like trade and to have power and wealth. When Germany started building numerous warships and being competition to them, they felt threatened because they knew that they could lose their naval supremacy and control over waters.
Disparities in access are largely due to high rates of uninsurance or inadequate health insurance among low-income Americans, although Americans with above-average incomes probably also have worse access to care than do their peers in other countries.