That's a bit of an oversimplification because I do have some other assets I've picked up over the years. But the bulk of my net worth is invested in those 3.
If I were to start over again I might even just hold SCHB, which I feel has enough international exposure to make SCHF and SCHE somewhat redundant, while also being more efficient for taxation purposes.
Canada has a lot of resource companies which largely follow the global economy.
Most big corps have less than half of their sales in US.
Developed markets still pay with a visa/MasterCard and have iphones. Or the US owns a stake in their local equivalent. Or Amazon is expanding there.
Truly emerging markets barely have a stock market, but their citizens probably eye a Coca Cola, have an intel PC and an android phone doing searches on Google.