South Korea is a country in the southern portion of the Korean Peninsula in East Asia and its official name is the Republic of Korea. It has a border with North Korea (the Democratic People’s Republic of Korea) to the north and borders across the seas with China to the west and Japan to the east. The history of Korea is about 5,000 years old. Several dynasties governed the Korean Peninsula, and the government of the Republic of Korea was established after the elections limited to South Korea in 1948. The Korean War began in 1950 when the armed forces of North Korea attacked South Korea and the war lasted for three years. The division of South and North Korea has continued since then. Rapid and vigorous social, economic, and political changes during the past several decades have occurred in South Korea. The South Korean agrarian society of the 1960s and 1970s was converted into an industrial society in the 1980s, and into an information society in the 1990s. The total population of South Korea stands at about 51 million as of July 2011.