One positive impact has been the mobilization of people around common goals and issues. For example, the American Civil Rights Movement in the 1950s and 1960s was a mass political movement that fought against racial discrimination and segregation. This movement brought together people from all walks of life to demand equal rights and justice for Black Americans. Through nonviolent protests, civil disobedience, and other forms of resistance, the movement was able to bring about significant changes in the laws and policies that discriminated against Black Americans.
On the other hand, one negative impact of the rise of mass political movements has been the potential for violence and conflict. For example, the rise of fascism in Europe during the early twentieth century was a mass political movement that resulted in the violent suppression of dissent and the persecution of minority groups. Under fascist regimes, political opponents, ethnic and religious minorities, and other marginalized groups were often subjected to violence, imprisonment, and genocide. The Holocaust, which resulted in the systematic murder of six million Jews by the Nazi regime, is perhaps the most extreme example of the dangers of mass political movements that promote hatred, intolerance, and violence.
In conclusion, while the rise of mass political movements has brought about positive changes, such as increased social and political mobilization, it has also been associated with negative consequences, such as violence and conflict.