Taking into account the formation of the ozone layer and the development of the atmosphere on the earth planet (after the previous pralaya), it must have been around 1,900 million years ago when the human civilization started.

Shukdeo says that in this kalp (day) of Brahma, Swayambhuva etc., six manvantars have already elapsed. The seventh one is running.

Swayambhuv was the first Manu of this kalp. His wife was Shatroopa. They had two sons and three daughters. In the family succession of the first son, Priyavrat, Rishabhdev, Bharat, Jadbharat and Prahlad are the most important ones. Dhruv was from his other son Uttanpad, and Bhagwan Kapil was from his daughter Deohooti who was married to Sage Kardam.

Much later in the generation of Dhruv, in the sixth manvantar, the greatness of King Prithu and Prachetas is notable. The descriptions of these family successions and generations run from the fourth to the ninth canto of the Bhagwatam. They describe just the important events of that manvantar that teach a devotional moral and propound the Gracious kindness of God that are helpful for a seeker of God’s love in strengthening his faith and improving his dedication for Him.

The second manu was Swarochish, the third was Uttam, the fourth was Tamas, the fifth was Raivat and the sixth was Chakchush. The seventh one is Vaivaswat Manu, the present one. There is also a brief description of the future seven manus in the eighth canto of the Bhagwatam. In all of the Puranas similar descriptions are found with less or more reflections of these events. Sometimes certain events do not mention the name of the manvantar in which it had happened because it is all the happening of a single day of Brahma, and moreover, the motive of their description is to induce faith and dedication in a God seeker’s mind, not to satisfy the intellectual thirst of a worldly historian. However, the chronology of time since the birth of Brahma is perfectly maintained and that very fact is enough to believe that our scriptures are Divinely produced.

In the family succession of Ikchvaku, Mandhata, Satyavrat (Trishanku), Harish Chandra and his son Rohit, Sagar, Aushuman, Dileep and Bhagirath, who brought Ganga on the earth planet, are notable; and also Khatwang who realized God in only 45 minutes before his death. Khatwang’s son Raghu, his son Aj and his son Dashrath; his son Bhagwan Ram, and Lav and Kush, are the main Divine personalities who really established the greatness of Surya Vansh in the world.

The family succession of Lav and Kush runs up to the Mahabharat war when Brihadbal was killed by Abhimanyu. This family succession goes further up to Sumitra where the Ikchvaku succession ends. (It’s all described in the ninth canto of the Bhagwatam.)

In the distant family succession of Pururva, there is a description of Maharishi Jamdagni whose son Parashuram killed Sahasrabahu Arjun of Haihai family. There is also an account of Sage Shaunak and Yayati of Nahush family.

In the Chandra Vansh family succession, the important personalities are, Dushyant, his son Bharat, and Bharadwaj. In the lineage of Bharadwaj, King Hasti established Hastinapur. His son Ajmeedh had many sons. In one of his son’s family succession were Drupad, Dropadi and Dhristdyumn; and in the other son’s family succession Kuru was important who lived in Kurukchetra. Kuru had four sons.

From here, the family succession of Kuru branches out in two very important sections. In the fifth generation of his son Sudhanva was Brihadrath who established the kingdom of Magadh. His son Jarasandh was killed in Mahabharat war by Bheemsen. In the twelfth generation of his other son Jahnu was Shantanu who was the King of Hastinapur.

Shantanu had three sons. Bhishm from Ganga (he always remained single) and Chitrangad and Vichitravirya from Satyavati, who was also the godmother of Bhagwan Ved Vyas. Chitrangad had no child and Vichitravirya died at an early age. So, on the request of Queen Satyavati, Ved Vyas Divinely caused both wives to conceive just by sight. They gave birth to Pandu who had five sons called the Pandavas, and Dhritrashtra who had hundred sons called the Kauravas (the eldest of whom was Duryodhan). They fought the Mahabharat war.

After winning the Mahabharat war, Yudhishthir, the elder brother of the Pandavas, ruled Hastinapur for 36 years and 8 months, and after the ascension of Bhagwan Krishn to His Divine abode, the Pandavas also travelled to the north and left their body in the Himalayas. Kaliyug started immediately after the ascension of Krishn (Bhag. 12/2/33) in 3102 BC.

Parikchit the grandson of Arjun became the king, who, after the 30th year of his reign (in 3072 BC), left this world after listening to the Bhagwatam. His son was Janmejaya. The dynasty of Chandra Vansh ended with Chemak and then other dynasties ruled Hastinapur.

The kingdom of Magadh remained in power up to the end of Gupt dynasty (83 BC). In the family succession of Brihadrath, Marjari (the grandson of Jarasandh) became the king of Magadh after the Mahabharat war in 3139 BC.