Australia is getting the new Prime Minister

Australia’s ruling Liberal Party voted in a new leader, Scott Morrison, who now became prime minister. Morrison, who was the country’s treasurer and previously a hardline immigration minister, replaces Malcolm Turnbull.

Australia’s top job has changed hands six times in the last decade with not one prime minister completing a full term. The most recent handovers involved less blood-letting and more internal party politics.

The attack on Turnbull came over his energy policy. He had proposed reducing carbon emissions, per the Paris climate agreement, but other members of the conservative ruling coalition pushed him to drop the requirement, ultimately calling his leadership into question.

Part of why Australian leadership has changed so often has to do with party rules. Until recently, both parties allowed elected members of parliament to overturn the party leader. As a result, former Labor prime minister Kevin Rudd swapped places with Julia Gillard twice in just over three years.

When Rudd returned to power in 2013, the Labor Party instituted rules requiring the wider party membership to vote on leadership changes, making it harder for elected members to surprise the general public.

Turnbull is leaving Morrison and the Liberal party with a parting gift: he says he will resign from his seat in parliament, opening up a by-election that could hand the seat to the opposition Labor party.

Scott Morrison, said his “new generation team” would “begin the process of healing.”

“I know this team can deliver the economy we need, the safety we need, and the togetherness we need,” he said.

The appointments include newcomers as well as holdovers.

The most significant changes in the cabinet involve Australia’s relationship to the world. Julie Bishop, 62, the widely respected foreign minister under Mr. Turnbull, resigned before Mr. Morrison’s announcement.

Mr. Morrison replaced her with Marise Payne, 54, who most recently served as defense minister.

Alan Tudge, 47, becomes the minister for cities, urban infrastructure and population, a position the new prime minister described as “the minister for ‘congestion busting,’” as Australia seeks to manage the impact of population growth in its cities.

The energy and environment portfolios are also being reorganized. They were managed by a single ministry, under Josh Frydenberg, who has been promoted and is now Mr. Morrison’s deputy.

Angus Taylor, 51, becomes energy minister, and Melissa Price, 54, environment minister.