It was part of the coalition Juntos Haremos Historia with the National Regeneration Movement and Mexico's Labor Party for the 2018 Mexican election.

The Social Encounter Party was founded in 2006 by Dr. Hugo Eric Flores Cervantes, a pastor of a Neo-Pentecostal church that supported Felipe Calderón in the 2006 presidential election.

In 2007, it supported the successful candidacy of José Guadalupe Osuna Millán of the PAN, but in 2013, it allied with the PRI in Baja California instead, which led it to elect a state deputy to a district in Tecate and four council members in Tijuana.

[23] In response, the national president of MORENA, Yeidckol Polevnsky, mentioned that her party believes in inclusion, joint work to "rescue Mexico" and that they will continue to defend human rights,[24] while Hugo Eric Flores Cervantes, national president of the PES, mentioned that "the only possibility of real change in our country is the one headed by Andrés Manuel López Obrador" and that his party had decided to be "on the right side of history.

[28][29] PES was reborn as the Solidarity Encounter Party (Partido Encuentro Solidario), using the same initials, and granted preliminary recognition to participate in the 2021 Mexican legislative election on September 2, 2020.

[30] The PES tended to include many strands of Christian humanist thought and was generally socially conservative, and Flores has stated that it was a "family" party.

[12] Other proposals made by the PES included shifting the collection of value-added tax to the states instead of the federal government and consolidating it with income tax.[33][why?]