Alan Kay, When he first created his OO language, SmallTalk 72, It didn't have classes, or Inheritance. That development came later in Smalltalk 80. The only thing that Kay cared about was encapsulated code that could pass messages around to other encapsulated code.

Kay's thoughts on the matter are in the link below.

http://programmers.stackexchange.com/questions/46592/so-what...

I made up the term 'object-oriented', and I can tell you I didn't have C++ in mind

-- Alan Kay, OOPSLA '97