The primary reason that elections are important to democracies are a chance for citizens to make their voices and beliefs heard and ensure the wants and needs of the people are represented through the election of representatives.
This representation is essential to the function of democratic governments.
Because the need to "repeal" amendments was sometimes necessary and desired by the people, as in the 18th amendment.
Pythagoras could be argued as one of the most influential scientists of his time. Pythagoras worked to discover many mathematical and scientific discoveries, including the Pythagorean theorem, Pythagorean tuning, the five regular solids, the Theory of Proportions, the sphericity of the Earth, and the identity of the morning and evening stars as the planet Venus.