Yes, even clones. Voltaire believes that humans are blank slates when they are first born, and their personalities and viewpoints are carved out by the environment they grow up in.
For example, a person growing up in poverty will see the world differently when compared with someone born wealthy. A person grown up eating tacos will see the world differently than someone who grew up eating meatloaf, etc.
As an existentialist I offer these words to my fellow OT people. Often people feel that there is no meaning in life, that we are candles lit only to burn out and that will be the end of us, because they feel that there is no after life, no existence after death. I say that these people are denying their very own human nature, that is the tendancy to be curious, and to hope that there is something after death, that there is a reward for doing good in life, and a punishment for bad. Deep down we all want to live on after death, some just want to live forever. Everything happens for a reason, some say that, "no good goes unpunished" that happens, because I believe that bad things happen to good people because it is a test of these people to see how they will react to something bad happening in their life. In order to appreaciate the good, we need to suffer the bad, because we do not know what we have until it is gone. So I say carpe dium, sieze the day and live life as a good person.
Gods of the ancient cradle of my race, hear me, just gods! with righteaous grace, on me, look down. Grant not to youth its hearts unchaste desire, but, swiftly spurning lusts unholy fire. Wind bless only those who from the battles wrack find refuge. A very good question matuzz.