One last person to know from the nineties is Liz Sanders. She wasn’t a designer by trade but had a pretty good impact on our profession.
She created the so-called book and methods which go by the name “Convivial toolbox”.
The idea of this book or toolbox is to “to bring the people we serve through design directly into the design process in order to ensure that we can meet their needs and dreams for the future”.
Design is definitely a democratic process that designers can help to make more fun and convivial and Liz is pushing us in that way.
Going further
This article is part of the book "A Tiny History of Service Design, " a tiny two-hour read that goes through the historical events that created what Service Design is today.