Industrial Revolution in Scotland by 1800. In 1800, 17 per cent of people in Scotland lived in towns of more than 10,000 inhabitants. By 1850 it was 32 per cent and by 1900 it was 50 per cent. By 1900 one in three of the entire population were in the four cities of Glasgow, Edinburgh, Dundee and Aberdeen. Glasgow emerged as the largest city. Its population in 1780 was 43,000, reaching 147,000 by 1820; by 1901 it had grown to 762,000. This was due to a high birth rate and immigration from the countryside and particularly from Ireland; but from the 1870s there was
Scotland in the modern era were completely closed down. A new service-oriented economy emerged to replace traditional heavy industries. This included a resurgent financial services industry and the electronics manufacturing of Silicon Glen. In the 20th century existing Christian denominations were joined by other organisations, including the Brethren and Pentecostal churches. Although some denominations thrived, after World War II there was a steady overall decline in church attendance and resulting church closures for most denominations. In the 2011 census, 53.8% of the Scottish population identified as Christian (declining from 65.1% in 2001). The Church of Scotland is the largest religious grouping in Scotland, with 32.4%