But at a European level — where Mr. Macron’s party did not even exist for the last election, in 2014 — he will now be represented by his own, fairly sizable bloc in Parliament. His party, together with a group of liberal parties, can create a sustainable working majority of pro-European parties.

Altogether, the pro-European parties, along with the Greens, will control 502 of the 751 seats, limiting the power of the populists to gum up the system and providing leverage for Mr. Macron, the Liberals and the Greens, and their desire to shake Europe to embrace a different future.

Next: The process of selecting the European Commission president, along with other important jobs, is likely to take many weeks, if not months. The choice, made by heads of state and government in the European Council, must be approved by the European Parliament.

Climate change: The issue of the planet’s future has become a major focus, especially among young voters. The Greens, focused on climate change and renewable energy, will be needed on many issues for a working majority, since they now hold 69 out of 751 total seats, an increase of 17 seats.