Carlos Slim Helú's financial might has led some people to nickname his native Mexico ‘Slimlandia’. He dominates the country’s businesses, from telecoms to construction. But how did a man whose hero happens to be the Mongol warlord Genghis Khan get to be the richest person in the world? Many have blamed his monopolist business empire for Mexico’s slow economic development. Simon Jack and Zing Tsjeng tell the story of a baseball fan who’s calm in a crisis, rushing in to invest while others rush out. Then they decide if they think he’s good, bad, or just another billionaire.

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Roman Abramovich was known as the "stealth oligarch" before he stepped into the limelight as Chelsea football club’s sugar daddy owner. The man loves a yacht: his largest cost $427m, and has bullet-proof windows and an escape submarine. Abramovich made his fortune from post-Soviet privatisation, aided by a man known as the “Godfather of the Kremlin”, Boris Berezovsky, and close ties to Vladimir Putin in the early years of his presidency. But with recent reports of a suspected poisoning and sanctions against him in the wake of the Russia-Ukraine war, Abramovich’s luck might be changing.

BBC business editor Simon Jack and journalist Zing Tsjeng track Abramovich’s meteoric rise from being a hard-up orphan to making billions from oil and aluminium. Then they decide if they think he’s good, bad, or just another billionaire.

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Mukesh Ambani caught the world’s attention when he forked out $600m on his son’s wedding, including a performance by Rihanna – but how did he become Asia’s richest person?

Mukesh grew his father’s polyester trading company, Reliance Industries, into a conglomerate. But when he died without a will, Mukesh had to fight his brother for control of the family business. BBC business editor Simon Jack and journalist Zing Tsjeng follow Mukesh Ambani’s story from living in a Mumbai slum to building the world’s most expensive private residence - featuring an ice cream parlour and an artificial snow room - then decide if they think he’s good, bad, or just another billionaire.

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Metal man and football fan Patrice Motsepe rose out of post-apartheid South Africa to become the country’s first black billionaire. Under apartheid, Patrice had to get a special permit to study at an ‘whites-only’ university - the same that Nelson Mandela attended in the 1940s - becoming a lawyer before following the gold into the mines. When the racist regime finally crumbled, he benefited from Black Economic Empowerment initiatives that turbo-charged his wealth. BBC business editor Simon Jack and journalist Zing Tsjeng track Patrice’s rise from asking to do the worst job in the mines to owning them. Then they decide if they think he’s good, bad, or just another billionaire.

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Jack Ma is the king of ecommerce in China. Nicknamed 'Daddy Ma', the former school teacher even appeared alongside martial arts legend Jet Li in a kung fu movie. But how did a scrawny, belligerent child, who was the only person who failed to get hired at his local KFC, become the chairman and CEO of online mega-platform Alibaba? BBC business editor Simon Jack and journalist Zing Tsjeng explain how a crazy trip to America, where Jack had to flee from a conman, ended up introducing him to the internet, which would make him his fortune. Then they decide if they think he’s good, bad, or just another billionaire.

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The story of how Yvon Chouinard, a reluctant billionaire who only wanted to climb and surf, harnessed his passions to create outdoor apparel brand Patagonia - before giving it all away to fight climate change. BBC business editor Simon Jack and journalist Zing Tsjeng discover how the self-proclaimed "existential dirtbag" went from jumping freight trains and eating cat food to leading the charge for businesses to commit to environmental causes.

Simon and Zing track the life of a man who claims that calling himself a businessman is as difficult for him as it for others to admit to being an alcoholic or a lawyer. Then they decide if they think Yvon Chouinard is good, bad, or just another billionaire.

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Whitney Wolfe Herd, the “queen of the swipes”, launched a female-led dating app after a public scandal around her sexual harassment and discrimination lawsuit against Tinder.

BBC business editor Simon Jack and journalist Zing Tsjeng follow her story from a popular student with a flair for marketing, to carving her own path in the male-dominated tech world. Owning the ‘girlboss’ image, she took her company Bumble public aged just 31 with her baby "on her hip", making her the youngest self-made female billionaire. But she wouldn’t stay one for long. Simon and Zing explore her story before deciding if they think she’s good, bad, or just another billionaire.

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Industrialist Aliko Dangote is known as a mild-mannered cement tycoon who often drives himself to business meetings. How did he become the world’s richest black person? Dangote rapidly dominated Nigeria’s cement, sugar, flour and fertiliser markets. He says his mission is to make Nigeria’s economy self-reliant, without requiring Western investment or imports. BBC business editor Simon Jack and journalist Zing Tsjeng look back on Dangote’s life - from a childhood selling sweets in the playground to becoming a watchword for success in Nigeria. Then they decide if they think he’s good, bad, or just another billionaire.

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How is freshly minted billionaire Sam Altman shaping our future through his company OpenAI and ChatGPT? He made his fortune by investing in huge tech start-ups like Reddit and Airbnb, before turning his attention to artificial intelligence - being fired and re-hired by his own company in the process. Altman believes that OpenAI, with him in charge, can make the world a better place. Yet he’s also preparing for the apocalypse, just in case AI turns on its creators and attacks humanity. BBC business editor Simon Jack and journalist Zing Tsjeng tell the story of Sam Altman - the first openly gay billionaire on the podcast so far - before deciding whether they think he’s good, bad, or just another billionaire.

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How did an unassuming software engineer become one of the richest people on the planet? This is the story of how Zhang Yiming transformed social media by creating TikTok, and how the Chinese tech company ByteDance became a multi-billion dollar business. BBC business editor Simon Jack and journalist Zing Tsjeng explore Yiming’s various successes with different apps before he hit the jackpot with TikTok. Then they decide whether they think he’s good, bad, or just another billionaire.

We’d love to hear your feedback. Email [email protected] or drop us a text or WhatsApp to +1 (917) 686-1176.

To find out more about the show and read our privacy notice, visit www.bbcworldservice.com/goodbadbillionaire