I thought the Bogleheads usually do recommend intl exposure for us investors. Like, for a not-too-agressive balance, 40% total-stock-market, 40% intl, 20% bonds.
Vanguard recommends it, lots of folks on Bogleheads.org seem OK with it (they tend to recommend a three fund portfolio), but Vanguard founder Jack Bogle has said he thinks a two fund portfolio is sufficient because the US markets list big international companies rather than only those in the US.
In his Little Book of Common Sense Investing, Mr. Bogle recommends a simple portfolio of only two funds for many investors: Vanguard Total Stock Market Index Fund and Total Bond Market Index Fund:
