A.I.G. Finds a Major Foe in Ex-Chief

Few people who know Maurice R. Greenberg, the former chairman and chief executive of the American International Group, thought he would go quietly. Now it is clear he is not going anywhere.

A recent spate of lawsuits between A.I.G. and C. V. Starr, one of two highly capitalized private companies that Mr. Greenberg controls, shows that Mr. Greenberg, who is 80, will do more than just use Starr's $22 billion worth of A.I.G. stock to build a private equity giant. He will also compete head-on with A.I.G