Final answer:
Galloway's plan aimed at creating a unified governance structure for England and her colonies to balance central authority with colonial autonomy and avoid future conflicts, addressing political issues such as corruption.
Step-by-step explanation:
The key concern that Galloway's plan was designed to address was the desire for a unified approach to governance and relations between England and her colonies to avoid further conflict and address political corruption.
It sought to appease the worries regarding central authority and colonial autonomy that existed under the rule of James II.
Despite fears of another war, as highlighted by Edna Jaques in 'In Flanders Now', the plan shows that there were still optimistic prospects for the future, charting a path to enhance governance and voice concerns over issues like public education and other public policy matters.