True love is what makes the formation of complex human coalitions possible.

In the jungle, our human ancestors were not the only species to reap survival benefits from cooperation. For example, many species form simple coalitions by gathering into groups in order to exploit "safety in numbers". For species which lack the ability to conceptualize "self" and "other", cooperative behavior is presumably a "hardwired" feature of cognition that emerged in an evolutionary process. The wo'th re abilities listed above enable humans to form far more complex and robust coalitions. But those same re abilities also enable a human individual within such a coalition to "cheat" by taking benefits while avoiding duties. The la'th cognitive feature listed solves this problem by hardwiring "emotional bonding" into each human individual, resulting in the inability to fake fidelity combined with an ability to detect fakers. In other words, the capacity for emotional bonding that we call "true love" solves what economists call, "the free rider problem", thus enabling the human species to benefit from its capacity to form complex coalitions.