The total effect combines the relative contribution of each predictor both alone and through the interactions with the other predictors. The dependent variables in the mixed ordinal logistic model were the order of arrival or emergence of individuals (Tables 1 and 2), while in the mixed nominal logistic model the dependent variables were binary (e.g., running towards the speaker or not; Table 3). Therefore, we analyzed for both sexes together (whenever possible), as well as separately for females. Here we specifically tested the DHH, and have demonstrated that in hyraxes this theory can predict leadership that involves risk. The females that were most likely to run towards the speaker after a playback were those that had mid-levels of testosterone and low levels of cortisol (Fig. S7b). Last, contour plots of the probability of leading as a function of cortisol and testosterone enabled us to evaluate the hormonal profile of a typical leader under the different risk scenarios (Figs. S5–S7, summarized in Table 4). Interactions between body weight and cortisol or testosterone were only detected in the low-risk scenarios. Interaction plots for the probability to lead as a function of standardized testosterone level for low (Lower than mean − SD, blue), mid (mean ± SD, green), and high (higher than mean + SD, red) standardized cortisol levels (i.e., see legend). The effect of body weight, hair cortisol and hair testosterone on the probability to first reach the speaker A and on the probability of running towards the speaker B in both sexes and in females. The effect of body weight, hair cortisol and hair testosterone on the order of arrival of hyraxes to a base station for the pooled data of both sexes, and for females. Galton's Hereditary Genius (1869) examined leadership qualities in the families of powerful men. This idea that leadership is based on individual attributes is known as the "trait theory of leadership". Anecdotal and incidental observations aside, the serious discipline of theorising leadership began in the 19th century. People who exhibit both a drive for achievement and a desire for social connections tend to participate actively in group-based efforts to solve problems. This propensity is attributed to their heightened interest in elevating their status and their readiness to conform their actions to match the requirements of the given situation. Individuals partly evaluate their own capabilities by observing others; working with a superior who is seen as an effective leader may help the individual develop a belief that he or she can perform in a similar manner. This differs from relating to the relevant parties as "followers" and calling up an image of a single leader with others following. These depictions can stem from actual circumstances, but they might also arise from political influences, monetary incentives, or the personal agendas of the author, media, or leader. In research about client service, it was found that expressions of positive mood by the leader improve the performance of the group, although in other sectors there were other findings. Leadership can be an emotion-laden process, with emotions entwined with the social influence process. These leaders must effectively operate remotely and negotiate the needs of the individual, team, and task within a changeable environment. Leadership of people in these environments requires a different set of skills to that of leaders in front-line management. Group members' dependence on group leaders can lead to reduced self-reliance andambiguous overall group strength. For this reason, it is unwarranted to assume that all leaders are in complete control of their groups' achievements. The validity of the assertion that groups flourish when guided by effective leaders can be illustrated using several examples. One response to this denial of élitism came with Leninism – Lenin (1870–1924) demanded an élite group of disciplined cadres to act as the vanguard of a socialist revolution, which was to bring into existence the dictatorship of the proletariat.citation needed When one possesses all five virtues together, each applied appropriately to its function, one can truly be a leader. Comparable to the Roman tradition, the views of Confucianism on 'right living' relate very much to the ideal of the (male) scholar-leader and his benevolent rule, buttressed by a tradition of filial piety. Leadership, is defined as the ability of an individual, group, or organization to influence, or guide other individuals, teams, or organizations. Leaders are often confronted with high-pressure situations that require them to manage their stress effectively. Prolonged exposure to stress can lead to emotional incapacity and negatively impact work-life balance. Executives at lower levels, such as general management positions, face significant emotional demands and pressure to execute plans from the top team.