The phenomenon of the Zoroastrian population decline has garnered considerable attention and discussion within academia, literature, and journalism.
A number of studies, conducted by both Indian and Western academics, have offered comprehensive insights into the complex dynamics underlying this demographic shift. Despite some segments of the community hesitating to acknowledge this decline, rigorous examination of census data and demographic studies spanning several decades sheds light on various factors contributing to this trend.
History The Sasanian Empire, which was the last Zoroastrian state in Iran, finally succumbed to Arab conquest by 642 CE. Subsequently, a significant migration of Zoroastrians to India occurred, likely in the 8th or 9th century, leading to the establishment of the Parsi community. Scholars, including Jamsheed Choksy, have hypothesized that the transition from Zoroastrianism to Islam among Iranians following the Arab invasion was a gradual process spanning several centuries, as evidenced by Islamic biographical dictionaries.
Furthermore, Bulliet's statistical analysis indicates that a mere 8% of urban Iranians were Muslim a century after the Abbasids’ rise to power in 750 CE, with this figure increasing to approximately 80% by the 10th century, although rural areas retained stronger Zoroastrian adherence.
Iran
The Zoroastrian population continued to decline due to conversions, persecution, and massacres, dwindling to a few thousand by the 19th century. Maneckji Limji Hataria's survey in the 1850s found fewer than 7,000 Zoroastrians in Iran. However, the efforts of Hataria and the Society for the Amelioration of the Conditions of the Zoroastrians in Persia' led to improved conditions in the 20th century. This resulted in a population rebound, with the 1966 census reporting around 20,000 Zoroastrians, over 9,000 of whom resided in Tehran.
Estimates prior to the Islamic Revolution in 1979, ranged between 20,000 and 30,000 Zoroastrians. Post-revolution, the 1981 census reported over 92,000 Zoroastrians, likely inflated due to Baha’is registering as Zoroastrians amidst the Islamic Republic's non-recognition of Baha’ism. Subsequent censuses have not recorded religious affiliation, necessitating reliance on estimates for current figures. Mobed Firouzgary's 2004 demographic report for the FEZANA Journal estimated the Zoroastrian population at 24,000, aligning with electoral data. However, migration, particularly of younger individuals, to Western countries due to economic challenges has led to a significant decrease in the Zoroastrian population, leaving an aging community behind. Current estimates suggest no more than 12,000 to 15,000 Zoroastrians remain in Iran, reflecting a serious demographic situation for the religion historically intertwined with the nation.
India
The majority of Zoroastrians in the world are Parsis, the descendants of refugees who migrated to the Indian subcontinent, fleeing religious persecution after the Islamic invasion and destruction of the Sassanian Empire. It is thought, they were economically prosperous in the centuries subsequent to their migration. However, this period was marred by the invasion of Gujarat by Alauddin Khilji, leading to various conflicts, riots, and massacres endured by both Parsis and Hindus against the invaders. Parsis were a predominantly agricultural community by 1650.
Under British rule, Parsis, along with Bhatias, Hindu Banias, Jains, Baghdadi Jews, Bohra, and Khoja Muslims, actively participated in mercantile endeavors, especially in the city of Bombay. Notably, Parsis provided significant support and financial backing to the nascent Indian Independence movement, with leaders such as Dadabhai Naroji, Bhikaji Cama, Phereozeshah Mehta, Khurshed F. Nariman, Ardeshir Godrej and Mithuben Petit. Post-independence, Parsis are known for their patriotism and they have played a leading role in the development of India as a republic, this includes India's first field marshall Sam Manekshaw and architect of India's nuclear program Homi Bhabha. Parsis have been described by various Indian politicians, including Narendra Modi as 'The World's Best Minority.
Key studies addressing Parsi population decline include Paul Axelrod's seminal works, such as "Cultural and Historical Factors in the Population Decline of the Parsis of India" (1990) and "Natality and Family Planning in Three Bombay Communities" (1988), along with other significant contributions like Jayant Kumar Banthia's "Parsi Demography: Past, Recent, and Future" (2003) and Chidambara Chandrasekaran's pioneering research on Parsi demography dating back to 1948. These studies collectively underscore a unanimous observation: the precipitous drop in Parsi fertility rates stands as a central driver of the population decline. Every demographic study conducted on the Indian Parsis, who constitute the largest component of the worldwide Zoroastrian community, indicates a steep and steady decline in population due to low fertility rates.
Contrary to biological conjectures, scholarly consensus suggests that low Parsi fertility primarily stems from socio-cultural factors rather than genetic predispositions. Early demographic investigations, such as Chandrasekaran's study, discredited biological explanations, emphasizing instead the influence of social norms and cultural attitudes on fertility rates. Axelrod's subsequent research further corroborated this assertion, in his 1990 publication in the scholarly journal Population Studies, he analyzed statistical findings and determined that “It would appear that Parsi women are not sub-fecund [i.e., more biologically infertile] and, once married, are able to bear children quickly and without difficulty.” When fertility becomes a biological concern within the Parsi community, it often arises from the practice of marrying and attempting to conceive children at an advanced age.
The decline in fertility rates among the Parsis is considered one of the most dramatic outside of Europe, leading to an unprecedented fall in population numbers. The impact of late marriage and non-marriage on the Parsi population is evident in the fertility rates, which are well below the replacement level necessary to sustain the population. In 1881, the birthrate for Parsis in Bombay was 34 per 1000 population, which dropped to 25 per 1000 population by 1926 and further slid to 12 per 1000 population by the 1960s. By 1961, due to late marriage or non-marriage, the births to Parsi women in Greater Bombay were only 50 percent of the number that would have occurred if every woman were married throughout her reproductive period.
The situation worsened in the following decades. By 1980–82, the total fertility rate (TFR) for Parsis was already 1.12, about half of the replacement level, and it further declined to 0.94 in 2000. Recent data from 2001 to 2006 observed a TFR of 0.88, a figure that is significantly lower than the TFRs of total populations in countries like South Korea and Japan, which are known to have serious demographic decline.
The low fertility rate has resulted in an aging Parsi population and a dramatic shift in the age distribution. Despite the decline in fertility rates since the 1880s, the Parsi population in India continued to grow until the 1950s due to lower mortality rates and longer life expectancy. However, as the number of elderly Parsis increased, new generations of Parsi children became smaller. By 2001, one in every eight Parsis was a child under the age of 15, whereas one in every four Parsis was aged 65 and above.
As these trends continue, the Parsi community in India will see a significant decline in population numbers in the coming decades. Projections suggest that by 2051, only 32,000 Parsis will remain in India, less than half of the current population. Similarly another prediction is that, the Parsi population of Bombay, which was 46,557 in 2001, is projected to decline to 20,122. Dinshaw Tamboly, the Chairman of The WZO Trust Funds has reckoned by the end of the 21st century there will only be 9,995 Parsis left in India.
Contributing factors Late Marriage Late marriage emerges as a salient feature within the Parsi community, with historical records tracing its evolution. While the Parsis, such as Behramji Malbari were pioneers in abandoning the practice of child marriage in the late 19th century, subsequent decades witnessed a progressive delay in the age of marriage. By 1930, the median age of marriage for Parsi women surpassed 24 years, significantly higher than national averages. Current data indicates even higher marriage ages, with the median age standing at 27 for women and 31 for men among Indian Parsis, substantially exceeding the thresholds conducive to population replacement.
The trend of late marriages among Parsis has led to a significant increase in the number of individuals who have never married. This phenomenon, as stated by Axelrod, is often a direct result of late marriages, particularly in the case of the Parsis.
Non-marriage It has been noted that delaying marriage often increases the likelihood of remaining unmarried. The rates of non-marriage within the Parsi population are striking, attracting the attention of numerous demographers. In 1948, Sapur Faredun Desai, author of “A Community at the Cross-Road”, expressed concern over the increasing rates of unmarried Parsis, which had risen by 40 percent between 1881 and 1931. Chandrasekaran's research shows that by 1931, 16 percent of Parsi women remained unmarried at the end of their reproductive cycle, a significant increase from 6 percent in 1901. This trend was not confined to urban areas like Bombay. Studies conducted in rural Gujarat found that between 13 percent and 55 percent of surveyed women remained unmarried well into middle age. In the 1960s, it was found that the percentage of married Parsis in Karachi was “unusually low” compared to Muslim women of the same age group.
Non-marriage of Zoroastrians is prevalent across all educational levels, indicating that it was not linked to any particular socioeconomic class. Current figures suggest that the proportion of single people in the Parsi community might be one of the highest in the world. In 1982, a study commissioned by the Bombay Parsi Punchayet (BPP), found that 45 percent of all adult males and 38 percent of all adult females surveyed were never married.
A similar study conducted by the Tata Institute of Social Sciences (TISS) in 1999 found that 40 percent of men and 30 percent of Parsis in Greater Mumbai remained unmarried throughout their lives. According to a paper presented by Sayeed Unisa and others in 2009, one out of every five Parsi Indian males, and one out of every ten females, is still unmarried by the age of 50.
Out-migration Due to the sheer magnitude of the departure, out-migration now seems to be significantly contributing to Iran's Zoroastrian population decline. This is the same for Pakistan and since the 1960s, out-migration has been observed as a significant cause in the decline of the relatively tiny community, centered in Karachi which was in the erstwhile Bombay presidency. As of 2009 it has been documented 95% of Pakistani Zoroastrian youth are making the decision to leave their homeland. Zoroastrians who stay in Karachi are noted to face economic discrimination based on their religious identity.