Zdeterminowanie. Czy człowiek (nie)zmiennym jest?

Some people are able to give up our addictions day by day, while others hesitate to do that for a years. Some of us could learn upon their mistakes, and others do not see the schemes governing their lives despite explicit information given. What decides on our ability to change our behavior and the way we think? This question can be considered partially answered from the research on the monovular twins – as it turns out that they are not identical, contrary to the pub-lic opinion. Considering child`s physical and mental growth we can think not only about the ge-netic influence, but also other factors, such as: foetal development, environmental and social conditions and – last but not least – their autonomous decisions made in adult life. In this paper the author analyzes all of this influences to give an answer to the former questions.