Important role of a project manager

-What do you think is the most important role of a project manager? Do you think that role has or will change over time? Be sure to also address how a project manager selects a project in your discussion. Do not forget to back up your ideas with academic sources noted in APA FORMAT.
– Your Post MUST include answers with substance (including examples) showing comprehension and it MUST also include a scholarly reference other than the assigned textbook when required. (Scholarly is defined as a peer-reviewed/professional journal article published within the last 5 years). Post also contain proper grammar and spelling.
Required Textbook:
Timothy J. Kloppenborg. Contemporary Project Management 3E. Cengage ISBN: