に大きな影響を与えた

had a great influence on

→ に
phrase Rare #43,065
had a great influence on に marks the person or thing affected.
JA: その映画は多くの人に大きな影響を与えた。
EN: That movie had a great influence on many people.

この小説は若い人に大きな影響を与えた。

This novel had a major impact on young people.

彼は周囲の人達に大きな影響を与えた。

He had a major influence on the people around him.

その政治家の死は政界に大きな影響を与えた。

The politician’s death had a major impact on the political world.

彼の言葉は私の人生に大きな影響を与えた。

His words had a profound impact on my life.