https://www.lifehack.org/571286/what-are-4-core-leadership-theories-and-how-apply-work


Leadership means the process of social affection that one person is able to manage others in obtaining the goals of the organization. There are several theories dealing with leadership, as follows:

  • Trait Theory

This theory attempts to describe types of behavior and personality tendencies towards the effective leadership. One of the pioneers of this theory is Thomas Carlyle (1841). He used such approach in identifying talents, skills and physical characteristics of men who arose to power.

  • Behavioral And Style Theory

Theorists begun to study leadership as a set of behaviors, evaluate the behaviors of “successful leaders”, determine a behavior taxonomy and identify broad leadership styles in response to the criticism of the trait theory.

  • The Managerial Grid Model Theory

The leader is not surely hostile but is apart from the participation in works and frequently provides praise and criticism for the work done. This theory is also established on behavioral theory. The developer of this theory was Robert Blake and Jane Mouton in 1964. They suggest five different leadership styles, regarding with the leaders’ concern for people and goal achievement. 
References:
https://shodhganga.inflibnet.ac.in/bitstream/10603/1991/18/18_chapter%203.pdf