Philadelphia has a rich history dating back to its founding in 1682. It grew steadily throughout the 1900s due to industrialization and immigration, reaching a population of over 2 million by 1950. However, since the 1950s the city has lost around 550,000 residents as manufacturing jobs declined and many residents moved to the suburbs. Today, Philadelphia is working to diversify its economy and focus on service industries, while also grappling with issues of poverty, crime, and racial segregation between neighborhoods.