Are ~ALL~ beans legumes?

I know soybeans are legumes, but what about kidney or pinto beans? People with gout must stay away from foods with purines such as shrimp, spinach, and legumes. However, beans a re a great source of protein and a good, healthy, CHEAP food (great for the current economy).

Thank you!!
Thank you to those who’ve answered so far. You’ve been very helpful. I’d like to add a little to the question:
Could somebody please provide a link to a graphic of the legume family tree (or a text version)? Hopefully it would include the common names along side the proper names of the various beans. This would help me understand what can be eaten safely by someone with gout.