Most money managers simply want to outperform the market. The people behind Generation Investment Management have bigger things in mind.

Generationis the investment firm led by Al Gore and Goldman Sachs alum DavidBlood. They want to deliver market-beating returns, reshape the worldof investing and improve the way companies behave.

"Bydelivering great returns to clients," says Blood, "we hope to makesustainable investing mainstream and in doing so encourage businessesaround the world to be more responsible, ethical and sustainable."

"Ourwhole reason for being in Generation," says Gore, "is to providethought leadership and prove the case that sustainability is central tothe realization of value over the long term."

No one will ever accuse these guys of thinking small.

My friend and FORTUNE colleague Adam Lashinsky and I just finished a 3,420-word FORTUNE storyabout Gore's decision to become a partner at Silicon Valley venturecapital firm Kleiner Perkins Caulfield & Byers. BecauseGeneration'sforming an alliance with Kleiner, we took a close look atthe firm. (Adam got to travel to London, and he reported and wrote thisposting with me.) While Generation has been less visible than Gore'sother business activities - he-s a director of Apple, a special advisorto Google and chairman of Current TV - the former vice president toldus that it has been and will remain "my principal business identity inthe financial markets."