If Britain had won the War

And yes probably there wouldn't have been school shootings... 

Real football?? No, it's not real football 'tis a load of s

Of course the Untied States of America would not exist at all, Canada would run the entire Atlantic coast from Baffin Island down to Florida and its western border would follow the Appalachian Mountains, the next bit heading west would be Native America, then Spanish of some form, and finally the South and West Coast would be Mexican. Alaska would still be Russian and Hawaii an independent state (though they'd still have the Union flag as part of the design of their national flag).

Having won the 7 Years' War, (which included the French and Indian wars) and suppressed the American Uprising (sorry, history would not have recorded it as a "war"or a "revolution"), which would have further humiliated the French, who were directly to blame for both conflicts. This would have dramatically increased France's national debt and sparked the French Revolution sooner, but this time Britain (and possibly Spain) would have stepped in to aid Louis XVI instead of just sending Lesie Howard to rescue a few nobs and so France would still be a monarchy, albeit just a titular one. Therefore the French Revolutionary Wars and Napoleonic Wars would not have happened thus halting the spread of Republicanism that ultimately led to the Russian Revolution. Which would also have removed the major impetus of the Agricultural and Industrial Revolutions - that is "total warfare". Industrialisation would still have happened, but at a much slower pace and probably not with Britain at its centre - thus Europe and the American colonies would have remained predominately rural and agricultural, and without that, so would the rest of the world. 

Without concept of "total warfare" WW1 would not have escalated as quickly or as globally as it did. France, Russia and Britain would still have supported Serbia, and Germany would have supported  Austria-Hungary, but on a much smaller scale and confined to the Balkans - the war would have been the short war everyone had predicted it to be. The result of which would not have been an armistice so the Treaty of Versailles would not have put reparation debt on Germany - net result being - no Hitler and no WW2. Also a shorter, lower scale war would not have destabilised Russia so no Revolution of 1917 and the Romanov dynasty would still be in power.