The list of presidents of Argentina from 1950 to 2000 is as follows:

1. Juan Domingo Perón (1950-1955, 1973-1974): Perón served as the President of Argentina from 1946 to 1955 and then again from 1973 until his death in 1974. He was a prominent political figure and the founder of the Peronist movement. Perón implemented various social reforms and nationalized several industries during his presidency.

2. Arturo Frondizi (1958-1962): Frondizi was elected as the President of Argentina in 1958. He implemented economic policies focused on attracting foreign investment and promoting industrial development. However, his presidency faced significant opposition from various sectors, including the military, which ultimately led to his removal from office in 1962.

3. José María Guido (1962-1963): Guido assumed the presidency after the military forced Frondizi to resign. His presidency was marked by political instability and a lack of legitimacy, as he was appointed by the military rather than being elected by the people. Guido's term ended in 1963 when Arturo Illia was elected as the new president.

4. Arturo Illia (1963-1966): Illia, a member of the Radical Civic Union (UCR), was elected as the President of Argentina in 1963. His presidency focused on promoting democracy, human rights, and social justice. However, his administration faced opposition from both conservative and Peronist forces, which ultimately led to his removal in a military coup in 1966.

5. Juan Carlos Onganía (1966-1970): Onganía came to power through a military coup that ousted Illia. His presidency marked a period of authoritarian rule known as the Revolución Argentina. Onganía implemented conservative economic policies and suppressed political opposition. However, his government faced increasing social unrest and protests, leading to his removal in 1970.

6. Alejandro Agustín Lanusse (1971-1973): Lanusse assumed power after Onganía's removal and served as the interim president until elections were held in 1973. He implemented political reforms and allowed for the return of Peronism. Lanusse organized the general elections that brought Perón back to power in 1973.

7. Isabel Perón (1974-1976): Isabel Perón, the wife of Juan Perón, became the President of Argentina following her husband's death in 1974. Her presidency faced significant challenges, including economic instability, political violence, and military interventions. In 1976, she was overthrown in a military coup led by Jorge Rafael Videla.

8. Jorge Rafael Videla (1976-1981): Videla led a military junta known as the National Reorganization Process (1976-1983). His presidency was marked by severe human rights abuses, including forced disappearances, torture, and killings of political opponents. The junta's rule ended in 1983 with the return of democracy.

9. Raúl Alfonsín (1983-1989): Alfonsín, a member of the Radical Civic Union (UCR), was elected as the President of Argentina in 1983, marking the return of democracy after the military dictatorship. His presidency focused on human rights, justice, and economic stabilization. Alfonsín also established the National Commission on the Disappearance of Persons (CONADEP) to investigate the human rights abuses committed during the military dictatorship.

10. Carlos Menem (1989-1999): Menem, a member of the Justicialist Party (Peronist), served as the President of Argentina for two consecutive terms. His presidency was marked by economic reforms, including the privatization of state-owned enterprises and the implementation of neoliberal policies. Menem also pardoned several military officers who had been convicted of human rights abuses during the military dictatorship.

11. Fernando de la Rúa (1999-2001): De la Rúa, a member of the Radical Civic Union (UCR), became the President of Argentina in 1999. His presidency faced significant economic challenges, including a severe economic crisis that led to widespread protests and social unrest. De la Rúa resigned in 2001 amid the crisis, marking a period of political instability in Argentina.

These are the presidents of Argentina from 1950 to 2000, each with their respective contributions, challenges, and historical context.