It doesn’t violate thermodynamics; it’s the conversion of mass to other forms of energy. Nuclear fusion is the source of energy from the sun, but the sun has th

It doesn’t violate thermodynamics; it’s the conversion of mass to other forms of energy. Nuclear fusion is the source of energy from the sun, but the sun has the advantage of its enormous gravity keeping things confined. The attempt to extract usable energy from controlled fusion on Earth is the attempt to, in the absence of this helpful gravity, find some other way to get enough nucleons close enough together. Nature makes this practically impossible, which is why we don't have fusion power after 70 years of trying. Fortunately, we don’t need it, as we can now use the sun’s fusion here on Earth.