Health At Every Size, or HAES, is a movement that says that every body is a good body, and can be a healthy body, without dieting or losing weight.You can purchase the book here or from smaller presses, and you can find Linda Bacon, founder of HAES, here. Her mission is "a more just world, where all bodies are valued, respected, and supported in compassionate self-care."
The Body Positive is "a national organization that offers a variety of resources and programming to teach and inspire youth and adults to value their health, unique beauty, and identity so they can use their vital resources of time, energy, and intellect to make positive changes in their own lives and in the world." You can find resources on The Body Positive
Body Love Wellness is a blog by Golda Poretsky, a fat posi writer whose mission is to empower plus sized women to live their best, most joyful lives, free of stress and shame over what they eat and what they weigh.
The Militant Baker, Jes Baker, is on "a mission to turn our society's concept of beauty on its oppressive head." She's also the author of Things No One Will Tell Fat Girls. She also has a huge and amazing list of other resources!
Sarah Schultz is an eating disorder intuitive therapist, recovery coach, and HAES-informed practitioner.
Laura Thomas is an anti-diet, weight inclusive nutritionalist.
Dr. Maria Paredes is a "Counselor, Certified Eating Disorders Specialist, Mother of 3 Rad Girls, Wife to a Bad Hombre, Fat Positive, Lover of ALL Bodies, Believer in Hope."
Melissa Fabello "is a feminist writer and speaker who covers issues related to body politics and beauty culture." This piece of hers on Everyday Feminism is a great starting point for someone looking to have conversations with their family or friends about fat acceptance.