Why did the united states of america became a democratic republic?

I often hear people argue that the United States is a republic, not a democracy. But that’s a false dichotomy. A common definition of “republic” is, to quote the American Heritage Dictionary, “A political order in which the supreme power lies in a body of citizens who are entitled to vote for officers and representatives responsible to them” — we are that. A common definition of “democracy” is, “Government by the people, exercised either directly or through elected representatives” — we are that, too.

because other regions has other things that egypt doesnt have.

which empire had the greatest influence on the history and cultural development of russia?