What reasons did the third estate use to push for social and economic change?

The answer is, The Flour War about high bread costs, would not like to cover all the regulatory expenses.

Explanation:

It comprised of three Estates that all had diverse rights, and the Third Estate had its most noticeably awful piece, prompting heaps of disappointment throughout the long periods of the Old Regime's presence, imbalance, and neediness or obligation. To oblige the majority of this, you were naturally introduced to a social class and couldn't climb on the planet except if you paid for an open office that conceded respectability or you turned into an individual from the Clergy, which the vast majority would not like to do on the grounds that they couldn't meet. At that point the laborers got activated. Most specialists were attempting to bolster themselves and their families, and the cost increment made them exceptionally furious. A few people even turned to taking so the grain could be sold at a sensible cost.

the declaration states, “we hold these truths to be self-evident, that all men are created equal, that they are endowed by their creator with certain unalienable rights, that among these are life, liberty, and the pursuit of happiness….”

yes he did writing dots to make the answer