Wikipedia: Built In Quality Control Process

How do Wikipedia’s processes for creating and modifying articles ever lead to high-quality results?

There is the risk that inaccurate and invalid information could be posted in Wikipedia articles for others to read; nevertheless, this risk is mitigated by the fact that there is very little incentive for individuals to post incorrect information as others will quickly correct it or remove it. The entire premise behind Wikipedia is to provide quality information in a timely manner while keeping the information free from inaccuracies. The fact that Wikipedia "archives" older versions of it's articles enables them to allow anyone to create and modify articles, while simultaneously reducing the amount of bad information available to the public. The quality control process in place behind Wikipedia is such that since everyone has privileges to create and modify articles, individual contributors public will police themselves in order to keep their own work reputable and preserves the integrity of Wikipedia.