It’s hard to tell from the single picture, but, the grain of the wood at the break seems to snake up and then down right in the wrist. Maybe it would have been just fine if the gun had never doubled, or, maybe it would have been fine if the grain ran dead straight at 90 degrees to the angle of the back of the action.
What kind of gun is it? Is there a chance of simply replacing the broken stock out of the parts department? I did that once, on my brothers Savage model BSE, long after the guns were out of production. He then broke that stock, but, I glued it up and got truly lucky, as the repair is invisible, to this day.
Best of luck with that.
Ted