Drinking Age.. Should it be lowered or raised?

This topic is very controversial. The drinking age is 21 as we all know.. only in America. In Europe the legal drinking age is 18. I know that the culture is different between America and Europe, because I've been to Europe and there were parents/their children drinking at my age.. even lower. There were 14 year old guys that knew when enough drinks were enough. I feel like some of us are mature enough to make that decision too. Should it be lowered? When I asked this question many people said no because more people would get wasted. I feel like this law isn't stopping anyone from drinking, especially teenagers. Some people argue that tolerance to alcohol will be much higher when we're 21 and that it is bad for our immune system. In my opinion, alcohol is bad for your system wether you're 18 or 21. In order to build your tolerance to alcohol, you would have to drink more. I don't think that depends on wether you get older. We are teenagers. I think most of us had at least one shot in our high school years and if you haven't, that's totally up to you. I am not encouraging teenagers to drink. I feel like when we are 18, we are legally and adult therefore we should be able to be mature enough to make our own decisions. Another point that was said to me was that more people will drink and drive. This is another very serious topic. I've done some research and at one point in America the legal drinking age was 18. It has been proven that more people who were 18 were drinking and driving. Honestly, I don't know where I stand at this point. There are so many different perspectives and I can't plot my opinion.