 Emigration is a mass phenomenon in Moldova and has a major impact on the country's demographics and economy.The Moldovan Intelligence and Security Service has estimated that 600,000 to one million Moldovan citizens (almost 25% of the population) are working abroad.Moldova's cultural tradition has been influenced primarily by the Romanian origins of its majority population, the roots of which go back to the 2nd century AD, the period of Roman colonization in Dacia.