fault/blame
¿De quién es la culpa?
Whose fault is this?
Who is to blame?
Who is responsible for this?
La culpa es de …
People:
This is Jane's fault.
This is Trump's fault.
This is his/her/our fault.
Jane is to blame.
Trump is to blame.
They are to blame.
If you talk about objects/abstract concepts:
Society is to blame.
Society is responsible for this.
Technology is to blame.
Technology is responsible for this.