Globalizan comes from the verb globalizar, meaning "to globalize." It's a thought-provoking word that speaks to the modern world's interconnectedness and potential homogenization.
In the song, Ruben Rada uses it to express a concern about the loss of individuality and unique cultural expressions if our thoughts become too uniform: "Si globalizan nuestro pensamiento, solo habrá un libro con el mismo cuento" (If they globalize our thinking, there will only be one book with the same story). This makes it a powerful and relevant word for today's learners.
Rada builds the whole song out of one question and never answers it. The verses lay out a world running on autopilot: "Cuando se pierde toda la poesía" (When all the poetry is lost), "Seremos una máquina de trabajar" (We will be a machine built for working). Thought gets standardised too, "Si globalizan nuestro pensamiento" (If they globalize the way we think), until there is one book left telling the same story. Then the chorus arrives and simply asks who is still around to do the other thing.
The sharpest line is political and a bit cheeky at once: "Si cada pueblo tiene un presidente" / "Que por lo menos rime con la gente" (If every nation has a president / Who at least rhymes with the people). Rhyming with your own people is a low bar and he knows it. He asks for harder things elsewhere, "Cuando el racismo no tenga pariente" (When racism has no family left), but the phrase he keeps returning to is "¿Quién va a pedir para que no calle el cantor?" (Who is going to ask that the singer not be silenced?). Coming from a man who spent sixty years keeping candombe audible, that one is not rhetorical.