159 “Popular” leaders, those capable of interpreting the feelings and cultural dynamics of a people, and significant trends in society, do exist. The service they provide by their efforts to unite and lead can become the basis of an enduring vision of transformation and growth that would also include making room for others in the pursuit of the common good. But this can degenerate into an unhealthy “populism” when individuals are able to exploit politically a people’s culture, under whatever ideological banner, for their own personal advantage or continuing grip on power. Or when, at other times, they seek popularity by appealing to the basest and most selfish inclinations of certain sectors of the population. This becomes all the more serious when, whether in cruder or more subtle forms, it leads to the usurpation of institutions and laws.
Source: Fratelli Tutti (Vatican.va)