The formative era (1780s-1820s)

He's in the formative era of his career prep, Ran.

His main areas of scholarship were political theory, constitutional law and the formative era of the American Republic.

Sid Meier's Civilization is an important example from this formative era, and popularized the level of detail that later became a staple of the genre.

He is a figure in the formative era of ukiyo-e doing early works on actors and bijinga "beautiful women."

He also suggested that the Arab conquests during the formative era of Islam were driven not by religion but by material want and covetousness.

During the formative era of geology in the early 1800s, Fairholme wrote two books on geology and published articles on coal, Niagara Falls, and human fossils.

Example California As I Saw It: First-Person Narratives, 1849-1900 contains the full text of 190 works documenting the formative era of California's history through eyewitness accounts.

It was very different during the formative era of American democratic politics before the Civil War.

Essentially, this was a time of transition, marking the end of the formative era.