The social life of children in their development is made up of novel attachments, intimacy, and self-defining social affiliation, beyond the first family bonding or attachment to primary caretaker(s). But it is also a life made of conflicts, prejudices, and fears, particularly the fear of being rejected and not recognized by others. In this context, self-assertion, or the need to affirm and make room for self in relation to others, plays a central role in shaping and driving self-concept development. It is also the source, from an early age, of budding self-deception. Self-conceptualizing is primarily the process by which we situate ourselves in relation to others: how close or how estranged we are in relation to them and what impact and power we have on others. In this respect, children show us that conceiving ourselves might serve a primary social function: the function of asserting who we are in relation to others, an important process by which we capture identifiable characteristics that shape our behaviors, intentions, and social decisions.