While he wrote other poems, "The Seasons" is his most celebrated work. It's a long, descriptive poem that celebrates the beauty and wonder of nature throughout the year. It was very popular in its time and continues to be studied and enjoyed today.
It's important to note that there were two poets named James Thomson. The one who wrote "The Seasons" lived from 1700 to 1748. The other, also named James Thomson, was a Scottish poet who lived from 1834 to 1882 and is most famous for his patriotic poems.