What is the most suitable age to have a right to vote? Why do you say so?

It was the issue in Korea just before the election of National Assemblymen and the age for vote have changed from 19 years old to 18 years old like other countries by Assembly members. There are people who have different ideas in the world. Most of them support politicians who can be help them. Human are selfish, so we vote for someone who has the bills that can be beneficial for us. There are always many conflicts between people. It\'s because of the generation gap, conflicts between city, gender and nationality. To solve these problem, I think politician should be selected from various parts such as the voice from students, LGBT and so on. Politics is the way to reduce the conflicts gap through discussion. I don\'t think that politicians can solve all the problem that we might have. To hear various voices from citizens, I think 18 years old is suitable age for vote because they have been educated enough to have their perception.