I know mein bola ki love is unconditional par apne aas-paas dekho, aaj duniya mein sabse important and basic cheez hain paisa kamana, not love. Ab past mein dekhoge toh many gods and goddesses fell in love (unconditional love). Uss waqt love was unconditional because there was no need to earn money. As simple as that.

Aaj dekhoge toh ek insaan pyaar baadme maangega and roti, kapda, makaan pehele. Unconditional love ki theory mast hain I know and bohot log ache examples bhi de denge to prove it. But nahi.