In the beginning of Treta, the Vedas and sacrifices and the distribution of caste and the several modes of life existed in full. On account of the duration of life being decreased in Dvapara, those suffer decline.
त्रेतादौ केवला वेदा यज्ञा वर्णाश्रमास्तथा। संरोधादायुषस्त्वेते व्यस्यन्ते द्वापरे युगे॥