In the 1930s, Germany and Japan had big appetites and the means to war, at least upon smaller others near-by, to satisfy them.
Italy merely had a big appetite.
This we are all taught in school --- 'the causes of WWII'.
But is this a truly complete explanation for all of WWII - above all for its extraordinary long length and the almost surprising defeat of the victorious Axis ?
If 'the-rest-of-the-world-combined' had been seriously willing to war with 1930s Japan, Italy and Germany to stop their aggression, even 1940s Japan, Italy and Germany, the Axis would have been quickly defeated.
The Axis simply had far too little manpower and far too little strategic resources , even far too little capital resources such as existing factories, science labs, locomotives and merchant vessels - let alone enough tanks, planes and battleships.
What these three nations did have, along with their fellow travellers around the world, was boundless will power and self confidence produced by the conviction that Science and Nature was on the side of their aggression.
That ------ and the fact that their very large (but also very reluctant) opponents basically agreed with them on the science of the matter.
Martin Henry Dawson's 'other Manhattan Project' had nothing really new to say as to why WWII was started.
But by successfully challenging the science that united Allied and Axis, it had plenty to say as to why it wasn't stopped ....