[5thGenTexan]

Actually, the version saw was:

There are three types of people:

1. Those who make things happen,
2. Those who watch things happen,
3. Those who wonder what happened

:-)

[Hugin]

In a similar vein, Thomas Edison was supposed to have said, “5% of people think. 10% think they think. 85% would rather die than think.”

[Texas Fossil]

Pretty similar.

Other version was my own.