Because of his extraordinary knowledge of fire and explosives, companies in civil litigation frequently sought his help in determining the cause of a blaze.

NEWYORKER: Trial by Fire

However, it was Kee's lifelong interest in Ireland that made him his name, and his extraordinary knowledge was reflected in his book The Green Flag, published in 1972, in three volumes.

BBC: Author Robert Kee dies aged 93

Lincoln made extraordinary efforts to attain knowledge while working on a farm, splitting rails for fences, and keeping store at New Salem, Illinois.

WHITEHOUSE: Abraham Lincoln

Morgan believes there are many common collaboration challenges that organizations face such as: difficulty finding people and information, duplication of work, work-life balance issues, capturing and retaining knowledge, working outside of silos and delivering extraordinary customer support.

FORBES: Finally, A Strategic Guide for Social Business