In short, I believe Darwin's theory was controversial in the 1800s because it contradicted the biblical view of creation.
(Sorry for the shortness.)
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I think the answer would be you pay it back to the issuer minus the interest since most bonds have periodical payment for the interests. However, this depends on the issuer but oftentimes the case would be as such. Hope this helps.
Disease was the most dangerous thing
The correct answer is New Federalism.
This policy of Richard Nixon focused on giving state and local government more power in solving social issues within their respective territories. Nixon felt that the federal government was too large and intrusive in scope ever since the New Deal programs developed by President Franklin D. Roosevelt. The New Federalism program would help to get rid of this oversight and allow states/cities to have more control over the funds they received from the federal government.