In a perfect world, we would all have a stable environment and an excellent support system. In a perfect world, so many of us wouldn't have PTSD! That being said, I think it certainly helps to have all of the aforementioned things, but I don't think it's a requirement for trauma therapy to be successful. I think the single most important thing is for you to start believing that YOU have the power to change, to heal. Even if you don't believe it, start telling yourself that. The more you do so, you'll notice your positive affirmations replacing the negative ones. If you do not have a stable home environment or a strong support system, this does NOT mean you can't move forward! It just means it may be a little more difficult. Are you ready to do this really hard work to heal? I live alone, was abused by my family, and have no support system outside of my therapist because I choose not to tell any of my friends the details of "my stuff". I have experienced great healing despite this. You need to make sure you have the coping mechanisms to get yourself through the hard times. You need to be able to trust yourself and rely on yourself for help. For me, this is much more healing than knowing I have someone else to depend on to make it better. It's all on me. I have the power and I love that. I do have a wonderful therapist I know I can call on when I do need outside help. I think you need to assess your coping skills, your willingness to do the work, and your support from your therapist. I don't think that you necessarily need to be living in a minimal stress eutopia for trauma therapy to be effective, you just need to feel confident in your abilities to manage issues that may come up. Some people aren't ready to do this and do require everything to be as calm as possible for their therapy to work. Find out what will work best for you, but please dont think that it can't be done.