On 29 December 1923, Editorial Haynes opened its main building on Río de Janeiro and Bogotá Streets, in Buenos Aires, and installed modern printing machinery.

On 24 May 1928 his company re-launched El Mundo in a tabloid format, which was easy for workers to read while commuting by trams, was full of pictures, much cheaper than other papers, and featured a weekly competition for a prize of $1,000 dependent on the football results.

This period was characterized by electoral fraud, persecution of the political opposition (mainly against the UCR), and generalised government corruption, against the background of the Great Depression.

[2] In his characteristically forthright and unpretentious style, Arlt commented on the peculiarities, hypocrisies, strangeness and beauty of everyday life in Argentina's capital.

[3] When General Juan Perón was elected president in 1946, he was eager to control the press, hoping to avoid the coups which had been supported by Argentine journalism; these had occurred frequently since 1930.

It still entered into a new era of journalism under writers such as Bernardo Neustadt, Ulíses Barrera, Ricardo Arias, Víctor Sueiro, Jacobo Timerman, Horacio Verbitsky and many more.

[citation needed] In May 1960, José Ber Gelbard called on Jacobo Timerman to undertake a renewal of the old El Mundo newspaper, which was bought by a group of businessmen said to be linked to the Communist Party.

[1] Following the coup, the company was gradually run down, a process carried out by the dictator Juan Carlos Onganía and Roberto Noble, owner of the newspaper Clarín.