The severity of the Russian winter. Plus the mass gathering of French soldiers in an adandoned Moscow inevitably resulted in ill-discipline, and ultimately the Moscow fire.
As Napoleon was committed to sending so many soldiers to the East, and Britain's naval power was so immense, there was no real prospect of mounting a meaningful invasion of Britain. 'The natural' obstacle being the English Channel - although considerable British effort was spent in building shore defenses at the very beginning of the C19th (prior to the 'main' Russian conflict).
Note also the difficulties of maintaining supply lines to the vast armies associated with Napoleonic warfare.
With regard to Russia, it is the sheer size of the country that creates the challenge. A Russian Army can retreat until the supply chain of an invading Army can no longer be managed and falls of its own weight. The UK is an Island Nation with a superb Navy and Naval Tradition to its credit. The English Channel is a defensive moat that even today is a serious challenge for any Amphibious Operation.
Napoleon was short, so the French didn't see him coming.
Genetic factors contributing to insulin resistance cannot be changed as of the early 2000s.
Delivery complications with rH factors can be prevented fairly easily. If the mother is rH negative than she will receive a rhogam shot during pregnancy and shortly after the birth. This prevents her body from rejecting the blood of the infant in the situation where they have opposing rH factors.
trade and conquests; also located on major trading routes and built its empire by conquering neighboring territory
Some risk factors, such as genetically related diseases, cannot be minimized. But minimizing other risk factors will help prevent problems with blood clots.
There are no clearly-established risk factors for multiple myeloma and it is possible that a combination of factors interact to cause the disease. Thus, there is no method for preventing multiple myeloma.
The slave rebellion in Haiti.
The risk of vulvar cancer can be decreased by avoiding risk factors, most of which involve lifestyle choices.
The two factors that contributed to Egypt's wealth during the New Kingdom were conquest and trade.I believe two factores contributed to Egypts wealth during the New Kingdom were the conquest and trading.
The creation of the communist backed country of North Vietnam AND it's intentions of conquering it's southern neighbor.
Conquest and Trade.