The claim that existentialism leaves a moral vacuum is a common one against this philosophy, and one that Sartre was aware of. Existentialism places freedom at the centre of human experience, and this includes the freedom from traditional moral views, which at first glance, could be worrisome for some people.
However, getting rid of moral traditions imposed by society is a choice: the choice to define your own morality. And by defining this morality, you replace old values with new ones. Therefore, there is no vacuum as there is no "empty space." When some social rules are removed from our ethical code, some other personal rules replace them. Sartre places great value on "authenticity." This is the creation of our own self in freedom. Through authenticity and freedom, we design ourselves, both as individuals and in society. Existentialism, therefore, does not imply the loss of ethics (and therefore, the lack of morals), but only the creation of a new ethics based on individual freedom and authenticity.
<span>His own hardships during his frequent visits to prison
This seems most accurate. He didn't really have a lower-class upbringing (to my knowledge) and he didn't entirely befriend lower-class individuals. He did spend quite a bit of time in prison where he wrote anonymous writings.</span>
Explanation:
My Dear father
I received your letter yesterday. I am fine. I am glad to know that you all are safe and sound. In the letter, you have wanted to know about my hostel life. Here, I am giving you a brief description of it.
The environment of my hostel is very charming. There is an open field in front of my hostel. I and my friends play here every afternoon. My hostel life is very happy and enjoyable. I can study here attentively. All the students are very helpful and friendly. Living here, I get opportunity to follow some rules and regulations. The foods are of high quality. The canteen and dining room are also neat and clean. In a word, I feel very happy living here.
No more today. My best regard to you
Yours affectionately