A US-trained economist, Wong (51), succeeds Lee Hsien Loong (72), who stepped down after two decades at the helm. Lee's resignation marked the end of a family dynasty led by his father Lee Kuan Yew, Singapore's charismatic first leader who built the colonial trading outpost into a business-friendly, affluent country during 31 years in office.

Wong, a civil servant turned politician, came to prominence while coordinating Singapore's successful fight against COVID-19. But he wasn't the first choice for the top job.

Heng Swee Keat, a former central bank chief and education minister, was the anointed successor but he withdrew his nomination in 2021. Wong was then picked by the ruling People's Action Party in 2022 to fill the vacuum and was quickly promoted to deputy prime minister.

“I will certainly strive to be a leader who is strong, kind, and decisive. And I will do my best to build a Singapore where everyone can realize their full potential,” Wong said on social media earlier this month.

Wong's ascension to the top has been meticulously crafted by the PAP — one of the world's longest-serving political parties and known for its clean and effective governance — and will not change the dynamics in the tiny nation of some 6 million people.

Wong has retained the Cabinet and held onto his finance portfolio as he prepares for his first big test in general elections due by 2025 but widely expected to be called this year. Before taking office, he promoted Trade Minister Gan Kim Yong as one of two deputy premiers. The other deputy is Heng.

Lee will stay on as a senior minister, a path taken by all former premiers.

While victory in the election is assured, Wong must clinch a stronger win after the PAP suffered a setback in 2020 polls over voters' rising discontent with the government.

Singapore under Lee's rule flourished into one of the world's wealthiest nations, but it also became one of the most expensive cities to live in. The PAP has also been criticised for tight government control and a government-knows-best stance, media censorship, and the use of oppressive laws against dissidents.

Issues like widening income disparity, increasingly unaffordable housing, overcrowding caused by immigration, and restrictions on free speech are often used as fodder by the opposition and have loosened the PAP's grip on power.

“One-party dominance in Singapore is weakening but the challenge for the PAP leadership is to slow down the process,” said Eugene Tan, a law professor at Singapore Management University.

Bridget Welsh, a Southeast Asia political expert, said Lee “will be remembered for steering Singapore quietly and successfully through turbulent waters from the 2008-2009 financial crisis and COVID-19. He helped to build resilience in Singapore. ... (But) Singapore has become a more complex society, with more open demands, making the task of governing (for Wong) more challenging.”

Wong was born seven years after Singapore separated from Malaysia and gained independence in 1965. His father was a migrant from China and his mother was a teacher.

Unlike many senior PAP leaders, he didn't have a privileged background. Observers have said this could help him connect better with the common citizen.

Wong earned a scholarship to study in the US, later obtaining a master's degree in economics from the University of Michigan and another master's degree in public administration from Harvard University.

He spent years in public service including as a principal private secretary to Lee before entering politics in 2011. He has handled the defence, education, communications, culture, community, and youth portfolios.

Like Lee, Wong is active on social media. Married with no children, he doesn't reveal much about his private life but has offered glimpses into his interests in music and dogs, and he is a fan of tennis star Roger Federer. He often posts videos of himself playing guitar.

Wong has launched a Forward Singapore plan to let Singaporeans have a say in how to develop a more balanced, vibrant, and inclusive agenda for the next generation. Wong often speaks in a flat tone and may not appear charismatic, but he is widely seen as a reliable and accessible leader.

“We can expect his leadership to be more consultative ... one that will emphasize the team concept wherein his key lieutenants will be prominent,” said law professor Tan.

Tan said Wong's immediate priorities will be to address issues including the rising cost of living, housing affordability, and job security. “Bread-and-butter issues remain vital even for a prosperous country, partly because of Singapore's innate vulnerabilities,” he said.

In foreign policy, Tan said Wong needs to navigate the “Sino-American power rivalry in which Southeast Asia has become a proxy theatre of the contest."

Singapore, like some of its neighbours, has stayed neutral but it may be forced later to choose sides on a variety of issues, he said.