There is a saying said that give me a boy until age 6 I will show you the man.
I don't think age 6 you can really tell. But by age 13 you really can. I can. Family does makes a huge difference. There is a massive difference if a child is from a divorced family or not. Having sibling or not also makes a difference in how he socialised with others.
I can go on and on about the difference and the examples but in case i get in trouble I will just leave it here.
If you are going to have a kid, really try not to get divorced. People said both parents are trying to do their best to the kids even when they are separated.
There is not a single kid that I have seen didn't get affected badly.
If you can have more than one kid, do it. No kid is fine (I am so glad and fortunate that I don't have any. Kids are not for me) but if you can have more than one, do it. I have huge sympathy and empathy to single child.
They are really bored. Especially in Australia, they are practically growing up always trying to find playmates when they are young and always on social media as teens.
Why do I just talk about boys? Because girls are more open to talk about feelings with others. Boys will easily grow up swallow everything in and the whole Aussie society will always them to man up.
By the time I see a boy at 13 I can predict what they might grow up to be like. I really hope I make a little difference in their path shaping they become splendid young men who respect multiculturalism and art , have respect to women, respect to themselves and valuable citizen to the society.