There are many debatable reasons for this, few of which can be discussed here.
This sentence does not serve any purpose for your essay. Start your body para with the first reason that you choose to justify your position.
Firstly, if we consider that a person's personality is mainly influenced by his traits with which he is born, then we are completely ignoring the importance of education and society in our life.
... this is fine to begin your body para.
There are many debatable reasons for this, few of which can be discussed here. Firstly, if we consider that a person's personality is mainly influenced by his traits with which he is born, then we are completely ignoring the importance of education and society in our life. As a child grows up, he comes in contact with lot of things which shapes his personality. His logical reasoning capacity develops and he enters the state of judgment about why a thing is wrong or right.
You should provide examples that with more specific nature. In this case you could have provided an example like;
It is a known fact that children who are brought up with strict discipline are more likely to behave well in their adult life compared to the children who grew up in more lenient environments in terms of discipline.