Humans have a social nature.  So every human being is dependent on other humans.  This requires humans to be able to change, including drastically, is our outer packaging, attitudes, and ways of thinking.  Likewise, among others, physical appearance, attitude, maturity, insight, and ideology.  This includes feelings of resentment, jealousy, or heartache that previously you could only keep to yourself in your heart, which can also bring change to individuals and groups.  So I agree more if humans can change caused by humans.  Even the innocent nature can change yes because of human activities.