Finding resources that are written by diverse authors takes additional research. Many authors of scholarly works have a page that includes a picture or a short bio, but it may not include the information you are looking for. You can also use resources that specialize in publishing and promoting works from representative authors.
The library's databases are not censored, meaning that an opinion piece an extremist wrote that was published in a newspaper can be found in the library databases. Therefore it is equally important to know how to identify works, authors, publications, or resources with a history of discriminatory and inaccurate science.