Conversation so far:
What were Alfred Adler's ideas on birth order?
Adler often emphasized one's birth order as having an influence on the style of life and the strengths and weaknesses in one's psychological make up.
How did he think birth order affected style of life?
For Adler, birth order answered the question, "Why do children, who are raised in the same family, grow up with very different personalities?.
What was the answer to that question?
While a strict geneticist, believing siblings are raised in a shared environment, may claim any differences in personality.

Question: What else about birth order did he find important?
Self-contained rewrite: What else about birth order other than influence on persons psychological make-up did Alfred Adler find important?