Old books from the 1800s with very outdated views on race, sex, etc would be an obvious example. Edit: and why is curation relevant to the question of whether

Old books from the 1800s with very outdated views on race, sex, etc would be an obvious example. Edit: and why is curation relevant to the question of whether there should be a common crawl that can be accessed by all, a publicly hosted mirror of the web that can be used to create competing search engines?