The sentence "brought great changes" is correct and can be used in written English.
You could use it to refer to the sweeping changes that an event, policy, or decision had on a situation or topic. For example: "The Supreme Court's decision to overturn the law brought great changes to family law throughout the country."
Technology has brought great changes to many parts of the world in recent decades, but the pace of change has been particularly breathless in the Thai countryside.
The series of wars known as the Mfecane ("The Crushing," causing a massive migration of Nguni peoples), which resulted from the expansionist policies of the Zulu leader Shaka, brought great changes to the Mpondo in the 1820s.
Since the 1980s and 1990s, China's economic and social transformation has brought great changes to its society.
Since the 1980s and the 1990s, economic and social transformations have brought great changes to Chinese society.
The YBAs brought great change to the British artworld.
World War II brought great change and growth to Beech Aircraft, as it expanded production and converted some of its models to military use.
This approach has brought great change, checking misuse or profligacy with government budgets and cracking down on corrupt practices in procurement policies.
The intervening 16 years have brought great change: the simple white, high-waisted muslin gown and the spare setting of the Villers attest to the passing of Rococo and the rise of Neo-Classicism.
But modern educational technology has brought great change and benefits.
The cascade of political events throughout Europe symbolized by the fall of the Berlin Wall 20 years ago this week brought great change to scientific research in the regions.
She will also explore the ways in which changes in society have affected the nature of war and how in turn wars have brought great change, for better and worse, to the societies that fight them.
