SUMMARY PROSPECTUS	Calvert Signature StrategiesTM	Calvert Investments
January 31, 2010	Sustainable and Socially Responsible Equity Funds	A UNIFI Company

CALVERT INTERNATIONAL OPPORTUNITIES FUND
Class (Ticker):	I (COIIX)

Before you invest, you may want to review the Fund's Prospectus, which contains more information about the Fund and its risks. The Fund's Prospectus and Statement of Additional Information (the "SAI"), both dated January 31, 2010, are incorporated by reference into this Summary Prospectus. You can find the Fund's Prospectus, the SAI, and other information about the Fund online at www.calvert.com/prospectus. You can also get this information at no cost by calling 1-800-327-2109 or by sending an e-mail request to Prospectusrequest@calvert.com, or by asking a financial professional who offers shares of the Fund.

INVESTMENT OBJECTIVE

The Fund seeks long-term capital appreciation through holdings that meet the Fund's investment criteria, including financial, sustainability and social responsibility factors. This objective may be changed by the Fund's Board of Directors without shareholder approval.

FEES AND EXPENSES OF THE FUND

This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.

Shareholder Fees (fees paid directly from your investment)
	Class I
Redemption fee (as a % of amount redeemed or exchanged within 7 days of purchase)	2.00%
Annual Fund Operating Expenses (expenses that you pay each year as a % of the value of your investment)
	Class I
Management fees	0.95%
Distribution and service (12b-1) fees	None
Other expenses	1.15%
Total annual fund operating expenses	2.10%
Less fee waiver and/or expense reimbursement 1	(0.90%)
Net expenses	1.20%

1 Calvert has agreed to contractually limit direct net annual fund operating expenses through January 31, 2011. Direct net operating expenses will not exceed 1.20%. Only the Board of Directors of the Fund may terminate the Fund's expense cap before the contractual period expires.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that:

• you invest $1,000,000 in the Fund for the time periods indicated;
• your investment has a 5% return each year;
• the Fund's operating expenses remain the same; and
• any Calvert expense limitation is in effect for year one.

Although your actual costs may be higher or lower, under these assumptions your costs would be:

Number of Years Investment is Held	Class I
1	$12,228
3	$57,097
5	$104,607
10	$235,974

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities ("turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the "Example", affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 98% of its portfolio's average value.

INVESTMENTS, RISKS AND PERFORMANCE

Principal Investment Strategies

The Fund invests primarily in common and preferred stocks of non-U.S. small-cap to mid-cap companies, which the Fund defines as companies whose market capitalization falls within the range of the Morgan Stanley Capital International ("MSCI") Europe, Australasia and Far East ("EAFE") Small-Mid ("SMID") Index ($25 million to $14.9 billion as of December 31, 2009). MSCI Barra reassesses the MSCI EAFE SMID Index quarterly and conducts full updating reviews twice per year and partial reviews in the other two quarters. The Fund normally seeks to have a weighted average market capitalization of approximately $5 billion.

The Fund invests no more than 10% of its net assets in U.S. companies (excluding High Social Impact and Special Equities investments). See "Special Investment Programs" in this Prospectus.

The Fund primarily holds stocks of companies in developed countries but as an internationally diverse fund, it may invest in any geographic region of the world if the Subadvisor deems the company attractive. The Subadvisor's stock selection process does not utilize a pre-determined geographic allocation, and the Subadvisor primarily uses a bottom-up approach focused on fundamental analysis of stocks of individual companies across all geographic regions. The Fund may invest up to 20% of its assets in securities of issuers in emerging market countries. The securities in which the Fund invests are often denominated and traded in foreign currencies.

Attractive companies are identified through a combination of valuation and growth metrics that seeks to identify companies with a sustainable competitive advantage. Stocks chosen for the Fund combine growth and value characteristics or offer the opportunity to buy growth at a reasonable price.

The Fund may invest in American Depositary Receipts ("ADRs"), which may be sponsored or unsponsored, and Global Depositary Receipts ("GDRs"). 

Although the Fund may employ leverage by borrowing money and using it for the purchase of additional securities, the Fund does not currently intend to do so.

Sustainable and Socially Responsible Investing. The Fund seeks to invest in companies and other enterprises that demonstrate positive environmental, social and governance performance as they address corporate responsibility and sustainability challenges. Calvert believes that there are long-term benefits in an investment philosophy that attaches material weight to the environment, workplace relations, human rights, Indigenous Peoples' rights, community relations, product safety and impact, and corporate governance and business ethics. Calvert also believes that managing risks and opportunities related to these issues can contribute positively to company performance as well as to investment performance over time. The Fund has sustainable and socially responsible investment criteria that reflect specific types of companies in which the Fund seeks to invest and seeks to avoid investing.

Investments are first selected for financial soundness and then evaluated according to the Fund's sustainable and socially responsible investment criteria. Investments must be consistent with the Fund's current investment criteria, including financial, sustainability and social responsibility factors, the application of which is in the economic interest of the Fund and its shareholders.

Principal Risks

You could lose money on your investment in the Fund, or the Fund could underperform, because of the risks described below. An investment in the Fund is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Management Risk. Individual stocks in the Fund may not perform as expected, and the Fund's portfolio management practices may not achieve the desired result.

Stock Market Risk. The stock market may fall in value (including stock markets outside the U.S.), causing prices of stocks held by the Fund to fall.

Common Stock Risk. Although common stocks have a history of long-term growth in value, their prices fluctuate based on changes in a company's financial condition, on overall market and economic conditions, and on investors' perception of a company's well-being.

Preferred Stock Risk. The market value of preferred stock generally decreases when interest rates rise and is affected by the issuer's ability to make payments on the preferred stock.

Foreign Securities Risk. Investing in foreign securities involves additional risks relating to political, social, and economic developments abroad. Other risks result from differences between regulations that apply to U.S. and foreign issuers and markets, and the potential for foreign markets to be less liquid and more volatile than U.S. markets.

Foreign Currency Risk. Securities that trade or are denominated in currencies other than the U.S. dollar may be adversely affected by fluctuations in currency exchange rates. When the U.S. dollar strengthens relative to a foreign currency, the U.S. dollar value of an investment denominated in that currency will typically fall.

Emerging Markets Risk. The risks of investing in emerging market securities are greater than those of investing in securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.

ADR and GDR Risk. The risks of ADRs and GDRs include many risks associated with investing directly in foreign securities, such as individual country risk and liquidity risk. Unsponsored ADRs involve additional risks because U.S. reporting requirements do not apply and the issuing bank will recover shareholder distribution costs from movement of share prices and payment of dividends. GDRs can involve currency risk since, unlike ADRs, they may not be U.S. dollar-denominated.

Small-Cap and Mid-Cap Company Risk. Prices of small-cap and mid-cap stocks can be more volatile than those of larger, more established companies. Small-cap and mid-cap companies are more likely to have more limited product lines, fewer capital resources and less depth of management than larger companies.

Growth Company Risk. Prices of growth company securities may fall more than the overall equity markets due to changing economic, political or market conditions or disappointing growth company earnings results. Growth stocks also generally lack the dividends of some value stocks that can cushion stock prices in a falling market.

Leverage Risk. If leverage were employed, borrowing would magnify the potential for gain or loss on the Fund's portfolio securities and would increase the possibility of fluctuation in the Fund's net asset value. Interest costs might not be recovered by appreciation of the securities purchased.

Performance

The following bar chart and table show the Fund's annual returns and its long-term performance, which give some indication of the risks of investing in the Fund. The bar chart shows how the performance of the Class I shares has varied from year to year. The table compares the Fund's performance over time with that of the Fund's current index, its prior index and an average.

The Fund's past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. For updated performance information, visit www.calvert.com.

Year-by-Year Total Return (Class I) 

Best Quarter (of periods shown)	Q2 '09	24.14%
Worst Quarter (of periods shown)	Q4 '08	-24.10%

After-tax returns are calculated using the historical highest individual federal marginal income tax rates, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on your tax situation and may differ from those shown. The after-tax returns shown are not relevant to you if you hold your Fund shares through a tax-deferred arrangement such as a 401(k) plan or individual retirement account. The return after taxes on distributions and sale of Fund shares may be higher than the return before taxes because the calculation assumes that shareholders receive a tax benefit for capital losses incurred on the sale of their shares.

Average Annual Total Returns (as of 12-31-09)	1 year	Since Inception (5/31/07)
Class I:
Return before taxes	35.39%	-8.55%
Return after taxes on distributions	36.03%	-8.52%
Return after taxes on distributions and sale of Fund shares	24.47%	-6.94%
MSCI EAFE SMID Index*	39.80%	-12.55%
S&P Developed BMI Ex-U.S. SmallCap*	45.07%	-12.19%
Lipper International Small/Mid Cap Core Funds Avg.	44.53%	-11.15%

(Indices reflect no deduction for fees, expenses or taxes. Lipper Average reflects no deduction for taxes.)

* In September 2009 the Fund changed its broad-based benchmark to the MSCI EAFE SMID Index from the S&P Developed BMI Ex-U.S. SmallCap (originally the S&P/Citigroup EMI Ex-U.S. Index). Changes by S&P altered the divisions for their capitalization-based indices and made the Fund's benchmark more small-cap oriented. With MSCI Barra's creation of a SMID index incorporating both mid-cap and small-cap non-U.S. developed market stocks, the Fund selected this index to better align with its investment process.

PORTFOLIO MANAGEMENT

Investment Advisor. Calvert Asset Management Company, Inc.

Investment Subadvisor. F&C Management Limited ("F&C")

Portfolio Manager Name	Title	Length of Time Managing Fund
Sophie Horsfall	Director, Global Equities Group, F&C	Since May 2007
Jeremy Tigue	Director and Head of Global Equities, F&C	Since May 2007
Terry Coles	Assistant Director, Global Equities Group, F&C	Since May 2007
Giles Money	Fund Manager, Global Equities Group, F&C	Since January 2008

BUYING AND SELLING SHARES

You can buy, sell (redeem) or exchange shares of a Fund, either through a financial professional or directly from the Fund, on any day that the New York Stock Exchange is open. The share price is based on the Fund's net asset value determined after receipt of your request in good order. To purchase shares directly from the Fund, open an account by completing and signing an application (available at www.calvert.com or by calling 800-368-2748).

All initial purchases must be made by bankwire or ACH funds transfer (each an "electronic funds transfer") in U.S. dollars.

Minimum to Open Fund Account

$1,000,000

The Fund may waive the initial investment minimum for certain institutional accounts where it is believed to be in the best interest of the Fund and its shareholders.

To Buy Shares
New Accounts (include application) and Subsequent Investments:	For wire instructions, call 800-327-2109
To Sell Shares
By Telephone		Call 800-368-2745

TAX INFORMATION

Unless you are investing through a tax-deferred arrangement, such as a 401(k) plan or an individual retirement account, any dividends and distributions made by a Fund are taxable to you as ordinary income or capital gains and may also be subject to state and local taxes.

PAYMENTS TO BROKER/DEALERS AND OTHER
FINANCIAL INTERMEDIARIES

If you purchase shares of a Fund through a broker/dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker/dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary's Web site for more information.

Investment Company Act file: No. 811-06563 Calvert World Values Fund, Inc.