"As a novelist, I have a somewhat higher soapbox to stand on than most people do when it comes to talking back to the merchants of fear"

This quote by L. Neil Smith suggests that as a novelist, he has a higher platform to speak out versus those who utilize worry to manipulate and control individuals. He indicates that his position as an author offers him a louder voice than many people, enabling him to challenge those who use worry to their own benefit. Smith is most likely referring to the power of storytelling and the effect it can have on individuals's beliefs and mindsets. He is recommending that by using his platform as an author, he can utilize stories to challenge the fear-mongering tactics of those in power and to motivate people to think on their own. By doing so, he can assist to create a more informed and empowered society.