What term refers to a person who can influence others to adopt certain ideas?

The term that refers to a person who can influence others to adopt certain ideas is "persuader." A persuader effectively communicates and presents arguments or perspectives in a way that motivates others to change their opinions or behaviors. This role often involves understanding the audience's needs, emotions, and values to tailor messages that resonate and foster agreement or support for particular ideas or actions.

While a leader can certainly influence others and may share some overlap with a persuader, the specific focus on the act of convincing or swaying someone's beliefs is what makes "persuader" the most precise term in this context. A mentor typically provides guidance and advice based on their experience, while an encourager offers support and motivation, which may not necessarily involve changing someone’s perspective on ideas. Each of these roles has its influence, but when it comes to directly shaping beliefs and ideas, a persuader is uniquely positioned to do so.