The first study specifically lists high-oleic peanuts, differentiating them from ordinary peanuts, and subjects still experienced weight gain.   The second implies higher satiety at lower caloric levels, but fat people ignore satiety and hunger signals and eat mechanically and/or emotionally.   The third implies a marginal effect from nuts, but specifically states that it effected every group individually, implying that it didn't increase the longevity of fats beyond that of healthy people, just compared to other fats.   Fact is, you can get fat eating kale and organic tofu. The peanuts may be healthier, but if you eat two jars of crunchy peanut butter a day, you will exceed your TDEE, and you will gain weight.