This is the 379th most frequent Russian word.
социальных
"Social."
The word 'социальных' is the genitive plural form of the adjective 'социальный', and here it modifies the noun 'проблем' (problems), meaning related to society.
Социальных проблем становится всё больше.
Social problems are becoming more numerous.
In this instance, 'социальных' is in the genitive plural form, describing the initiatives (инициатив).
Эти программы направлены на поддержку социальных инициатив.
These programs are aimed at supporting social initiatives.
Here, 'социальных' modifies 'систем', also in the genitive plural, referring to systems associated with society.