Philip Kotler (born 1931), who has been a professor of marketing at the school for over 40 years, is largely responsible for that.

ECONOMIST: Guru

The average public school building in the United States is over 40 years old.

WHITEHOUSE: The White House Blog: The President

The last member of the group, a slight, nervous-seeming man with a grey goatee had retired this past summer after 40 years of teaching math in a Fort Worth high school.

CNN: Why a pundit wrote a novel

One person who taught me a great deal about being fearless was my childhood friend, Jennifer Goodman Linn, a Duke and Harvard Business School graduate and marketing executive who, this week, at just 40 years old, lost her seven-year battle with a soft tissue cancer called sarcoma.

FORBES: What Does it Mean to Be Fearless?

Professor Michael Jensen of Harvard Business School (along with Bill Meckling of Rochester) did some formidable research now almost 40 years ago on the agency-principal problem in modern corporate America.

FORBES: The Difference Between The Mindsets Of Founders And Professional Managers

Even before the financial crisis, over 40% of young people in Greece and Italy were out of work five years after leaving school.

UNESCO: One dollar invested in youth skills can pay back fifteen-fold in economic growth | United Nations Educational, Scientific and Cultural Organization

Ted Stevens, a Harvard Law School graduate and former prosecutor, helped engineer statehood for Alaska and has served as the state senator for 40 years, a powerful position that has allowed him to steer billions of federal dollars to his state.

NPR: Taped Phone Conversations Played At Stevens Trial

The organisers invited him to make a symbolic apology to the Nine, and to open the front doors of Central High School in front of a large crowd which, more than likely, contained a few of their former tormentors from 40 years ago.

ECONOMIST: Desegregation 40 years on