Just outside Islamabad, the capital, a huge stone structure has been built.

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Castle Point Capital is mainly invested in financial service companies and real estate investment trusts, similar to the private equity orientation of a related company, Stone Point Capital, also headquartered in Greenwich, Conn, home to many large private hedge fund operations.

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AD, the Abbasid caliph al-Mansur consulted a Persian astrologer called Nawbakht to find a conjunction of the planets favourable to laying the foundation stone for a new capital.

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Larry Summers, Mary Meeker and Biz Stone all recently joined venture capital firms.

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But a cultural capital isn't built only on steel and stone.

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Stone is taking an advisory role with Spark Capital, an early backer of Twitter.

FORBES: Biz Stone Joins Venture Capital Firm

In my lifetime, I went from stone cold broke to self-made millionaire because of capital gains.

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Now, we can add Twitter co-founder Biz Stone to the burgeoning list of high-profile names to drink the venture capital Kool-Aid.

FORBES: Biz Stone Joins Venture Capital Firm