At the creation of Pakistan, a large number Mohajirs migrated from India and settled in to Sindh. From 1947 to 1951 nearly 1 million Mohajirs settled into Sindh (Rais, Rasul Buksh). They had also gained majorities in Karachi, Hyderabad, Mirpur Khas and Nawabshah(Kardar,1992). As time passed Mohajirs dominated the business and bureaucracy in the region. According to the 1981 census, the Sindhis made up 55% of the total population of Sindh and mohajirs were second with a share of 24% (Pakistan,1981). In 1973 more than 30% of the top bureaucracy belonged to the mohajir origin in pakistan (Government Of Pakistan,1973). The above information shows that the Mohajirs were very much taking over the province of Sindh, in natural reaction to that, the Sindhis worked as a strong ethnic group to safeguard their rights and very much their existence in their own province.
Though there are many reasons for the Sindhi ethno nationalist movements, the Sindhi clash with the Mohajirs was one of the main causes for activity during the 1970s. Zulfiqar Ali Bhutto came into power in 1971. Due to extreme pressure from the Sindhi people (Bhutto who himself was Sindhi) he adopted a very pro Sindhi style for the initial period of his rule. One major political impact of the Sindhi ethno-nationalist movement was the introduction of quota system in Sindh. According to this system, the government created urban and rural categories and allocated jobs