Who created captain kangaroo and why?

Robert Keeshan, from the start. He wanted an intelligent male role model ( actually two with the agrarian sidekick Mr. Green Jeans- two different actors) as he felt there were too many feminine types in the kidvid arena at the time- not entirely substantiated. Unfortunately Captain Kangaroo did use cartoons- and reguarily ran a number of them such as Tom Terrific- look up under that name. They did not dominate the program, but he did turn to them at times.