The decline of the city is a viscous cycle: people and businesses leave (in our case due to deindustrialization), this leads to a decrease in tax revenue and environmental quality, this leads to a reduction in taxes. increases and reductions in services, causing even more people and businesses to leave. The decline of cities cannot be reduced to a single factor, but we can identify the main influences. Decline is the combination of many different economic and social factors that can turn a once vibrant metropolis into a dangerous and desolate wasteland. Pennsylvania is the birthplace of this country, the place where the Founding Fathers wrote the Declaration of Independence and years later the Constitution. The largest cities in Pennsylvania are Philadelphia and Pittsburgh. Once thriving cities, they both now face declining populations. Various local efforts and government projects aim to reverse this trend, but I think we need to go back in time and see where this decline began. How can we develop solutions to our modern problems without looking back to see what history did to lead to them? Pittsburgh was once a prosperous city, its decline began slowly in the mid-20th century. Their prosperity was a result of their location in the “rust belt.” The “Rust Belt” included all the cities that played a key role in American industry in the 19th and 20th centuries. States rich in coal and iron were the steel powers of the industrial revolution. These states included Pennsylvania, Ohio, Michigan, Illinois, and Indiana. The major cities of the “Rust Belt” were Chicago, Baltimore, Buffalo, Cleveland, Detroit and Pittsburgh. During the Civil War, Andrew Carnegie built Pittsburgh's first steel mills to meet the demand for weapons and during the world...... middle of paper ...... there are many uneducated workers who would benefit from a simple workplace. . If we returned manufacturing to the city, it would thrive again and eliminate unemployment. Looking back on Pennsylvania, we see that despite best efforts, Pittsburgh is in decline and Philadelphia is experiencing population growth although its growth rate has slowed. Both of these cities have been heavily impacted by the economic shift from manufacturing to technology. This transition from the “Rust Belt” to the “Sun Belt” ruined the economy, leaving everyone unemployed. After that, those who could move left the city and settled in the suburbs where there were jobs. After white flight, these two cities deteriorated into cities of crime and poor education. It doesn't help attract people; Recently, the city has been invaded by a movement of young idealists determined to save their beloved city..