People are not born free in any meaningful sense of freedom. If I were to define a human being, I certainly would include self awareness and free will. But the definition of a human must also include a description of the essentials of the body in which self awareness and free will abide. That body comes with inherent constraints. We experience the world from within individual bodies that exist in time and space. Those bodies grow during a long period of vulnerable childhood, require food and shelter, and a possess diverse sensory mechanisms inclined to feelings including emotional attachment, joy, sorrow, pleasure and pain. People are not born free--they are born in mortal danger of perishing immediately, unless there are other people willing and able to provide for their needs until such time as they can provide for themselves.
In the abstract, providing for oneself is a full time job. It takes a lot of time to secure and prepare food, find and maintain shelter, and perhaps reciprocate in duties of care for others. We see, immediately and inescapably, the fundamental need for some minimal social cooperation in order to sustain human life. But at that minimal level of social cooperation, there is no real freedom because most, if not all, available time is consumed in the provision of food and shelter and care for our immediate social group. Time is the universal constraint: we have only so much of it, and if we have to spend all available time providing for basic needs, then there really is little scope for freedom. And in a condition of even moderate scarcity, we might expect the individual pursuit of essentials to lead to conflict and thereby create another essential need: protection.
It is not hard to see that we can increase the scope for individual freedom through social cooperation. Tacit or explicit agreements on specialization with those in our own and neighboring social groups allow us to provide for our essential needs more efficiently. At some point, this efficiency may yield sufficient surplus time to allow us to meaningfully consider the concept of freedom. We are not born free. We are only able to speak of freedom once we have a level of social cooperation that allows for efficiency in meeting essential needs and creates a surplus of time.