Read Advantages Of Youth In Politics. Also, know the Benefits and Impact of Youth In Politics. See Importance and main role of youth in politics. Young people between the ages of 15 and 25 constitute a fifth of the world’s population but people under the age of 35 are rarely found in political leadership positions. Here you will know the Advantages Of Youth In Politics. In the area of political participation, eligibility for national parliament starts at 25 years old or older in a third of all countries.