Ethical persuasion starts with a better choice architecture
Persuasion is part of everyday work: proposals, leadership, negotiation, marketing, and difficult conversations. The ethical question is not whether you influence people, but whether your influence preserves their ability to choose.
A useful standard is transparency. Make the relevant information visible, avoid manufactured pressure, and leave the other person better able to evaluate the decision. This is influence as service, not control.
Practice begins with diagnosis: understand the other person's goal, constraints, and uncertainty before choosing a framing or tactic. The same habit also helps you recognize when someone is trying to manipulate you.