Mary Janet Cargill was born in United States. Contraction in world economy spoiling food family's fortune. Fiscal 2009 earnings down 15% to $3.3 billion despite revenues remaining steady at $117 billion. William Cargill, son of Scottish sea captain, founded Iowa grain storage business after Civil War. Will's son-in-law John MacMillan took control 1909. Low-profile family owns 88% of Cargill; hasn't run company since Whitney stepped down as chief executive 1995. Firm controls food from stable to table: animal feed, meat, crops. Also runs large commodity trading and risk management operations. Family owns majority of fertilizer maker Mosaic; shares up 30% since February 2009.