AJ's main themes: Upper & low caste issue,Waaris issue, etc
At a first glance the "waaris" issue may have appeared to be the main theme in Agle Janam, but I believe the major issue was the matter of upper and lower caste - a major problem in India, I think.
In Agle Janam, the writers tackled this issue as a love story between an upper caste young man, who fell in love and married a low caste girl, against his family's wishes (including his legal wife's!!!) and societal norms.
The union of Shekhar and Laali was supposed to bridge the social gap. As expected in real life, it didn't. Instead, it brought about a storm that battered at the foundation of that love, and worked to separate them.
Another issue tackled was that of the secondary position of women in society. Sudesh Berry's role as Loha, highlighted this problem time and again. Many times he declared women as mere chattels, only there to serve man and his purpose. It didn't matter, whether it was wife or daughter. (Ratna's marriage to the minister's son was arranged to get more contracts.)
Ranvijay's rejection of his own daughters Riddhi, Siddhi because they were girls also highlighted this.
Other issues were of:
- domestic violence: Loha's verbal,mental, emotional abuse of Sumitra, his two sons, daughters in law, including the servants. Ranvijay went to the extent of physically abusing Nandini, (he is doing the same with Rekha now)
- family infighting (brother against brother; father against sons)
- marital problems (Shekhar's and Sid's - two people could be married but there was no love; so too with Ranvijay and Nandini)
- issues of extreme poverty, selling of daughters, child marriages, etc.
Unfortunately, no issue was tackled to any great extent. The AJ writers merely touched on it, the rest was left to the viewers' imagination. The viewers were so enamored by the doings of the actors, that these issues escaped them.
This is why AJ remains a mediocre serial.