Advancement of civilization means brahma-darśanam. That is advancement. Because so long we do not come to the platform of understanding that, "I am spirit soul; I am part and parcel of the Supreme Spirit," we are in the ignorance—in different forms. The example is given very nicely: Just like raw wood, just from the trees, you cut the trees, it is raw, it is not immediately fit for burning. But when it is little dried you can ignite fire, and, igniting fire, immediately there is no flame; there is smoke. Then, after the smoke, there is flame. And that flame is required.
So this gradual process of evolution means one must come to the platform of understanding Brahman. Ahaṁ brahmāsmi: "I am . . . I am spirit soul, and I am part and parcel of the Supreme Soul." This understanding one must come. So for that understanding one has to come to the platform of goodness, sattva-guṇa. If one remains in the rajo-guṇa and tamo-guṇa, as we have explained, then we shall be entangled in this material world.
We may get a different types of body, even if we get the body of demigods or European body, American body, as they are understood, very advanced. So not only European, American, but there are other improved condition of life in higher planetary system. They're all made of rajo-guṇa. Rajas-tamas. Tadā rajas-tamo-bhāvāḥ kāma-lobhādayaś ca ye (SB 1.2.19). Because everywhere you'll find the prominence of greediness and lust. Everywhere. Even in the heavenly planet, the king of heaven, he's very, very, very much lusty. There are so many instances. He's very much fond of sex life, Indra.