The answer to this question is:
"The First paragraph of the declaration of independence is mostly the introduction talking about what there gonna be talking about in the declaration of independence and also talks about the preamble..."
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<span>The U.S. government supported nativist attitudes during the 1920's due to the rising levels of nationalist sentiment that was growing within the American population. The outcome of WWI and other related events had shifted popular opinion well in that direction. As a means of supporting these positions, the government issued the Emergency Immigration Act of 1921 and National Origins Act of 1924, pieces of legislation which imposed quotas on the allowable levels of immigration from certain European nations.</span>
Thomas Jefferson said that all men have the right to life, liberty and the pursuit of happiness (though Jefferson did not originally think of the last one). Keep in mind that by "men" he means white, well-off men, not women or slaves.
This immigration law slowed down immigration to America.