The present research aims at studying the relationship between cultural and social factors and collective, ethnic and tribal strife in Lordegan. The relationship between cultural and social factors including demographics, level of using mass media, relative deprivation, anomy, ethnicity, ethnics, aggressiveness, social cohesion, social control and socioeconomic base and collective, ethnic and tribal strife is surveyed in the framework of 10 theories. The research method is descriptive and is of correlative type. N=116, 436 including men and women over 15 years of age in Lordegan.The under-survey sample (414 persons) is selected through quotabased random sampling from among the entire group. The required data of the research is collected through using a self-made questionnaire with 0.96 validity based on Chronbach Alpha coefficient. Descriptive statistics method(mean, plenitude, percentage and graph, and inferential statistics (single T variable, variance analysis, Pearson & Spearman correlation coefficient, multiple regression and chunk test)is used to analyze the research statistically. The results indicate that the variables such as aggressiveness, ethnicity, anomy, and relative deprivation have significant positive relationship with each other. Variables of social control, social cohesion, socioeconomic base, age, gender, education have reverse significant relationship with each other; while there is no significant relationship between variables such as level of using mass media and being married, and tendency toward collective, ethnic and tribal strife. In addition, tendency toward collective strife is more among men, compared to women. Tendency toward collective, ethnic and tribal strife is different among different races of the under-survey statistical community.