Fourteen members of a global crack cocaine smuggling network have been jailed for between five and 27 years.
Ian Dundas-Jones was described as the "Top player"
London's Snaresbrook Crown Court heard the gang was thought to be responsible for smuggling cocaine worth almost £50m into the UK.
The court was told the group, known as the Bling Bling Gang, got young women hooked on the drug and then forced them to work as drug mules.
Another 65 members have been jailed in France, Guyana and the US.
Fourteen members of the gang were sentenced on Monday.
The court heard how the gang smuggled cocaine paste and cocaine liquid from the Caribbean into the US, Canada, Europe and, in particular, London.
They rented a house in East Ham, east London, which they used solely as a place where they turned cocaine into the more addictive crack.
Ian Dundas-Jones, 35, of Leyton, east London,
Bernard Clarke, 31, of Romford, east London
Lisa Bennett, 39, of South Tottenham, north London
Troy Alleyne, 36, of Stratford, east London
Cy Oswald Stephens, 32, of Birmingham
Nekeisha Anderson, 22 of Walthamstow, east London
Amy Anne Farrow, 21, of Wallington, Surrey
Segun Fisher, 29, of Peckham, south-east London
Clare Jones, 39 of Coventry
Jason Miranda, 26, of South Croydon, south London
Sandra Dundas-Jones, 44, of Leyton, east London
Clyde Benjamin, 30, of Kennington, south London
Rolex Graham, 30, of Leyton, east London
Candy Blackman, 32, of West Norwood, south-east London
The gang members spent vast amounts of the proceeds on designer clothes and jewellery.
Passing sentence Judge Timothy King said they were motivated by greed.
He said: "You and those like you... are a scourge upon decent, civilised society, and you bear a heavy responsibility for the despair and ruination that you visit upon others."
The first to be jailed was Ian Dundas-Jones.
The judge said that as the "top player" in the gang, he oversaw multiple drug runs into Britain, the transfer of funds abroad, recruitment, the "meeting and greeting" of couriers, and the manufacturing and distribution of crack.
Det Sgt Adrian Hodgetts, the senior investigating officer, described the gang leaders as highly organised and ruthless.
"Their convictions have caused a significant downturn in the amounts of crack cocaine on London's streets, and today's sentences will greatly impact on making London a safer place."
Police said the gang, originally of Guyanese and Caribbean descent, exploited dozens of vulnerable young women.
They were often single mothers, who they would get hooked on drugs before forcing them to work as drug mules to pay off debts.
Their families would also be threatened.
Police found £1m of crack in the house
The couriers used specially adapted shampoo or perfume containers, vases, rum bottles and suitcases to smuggle cocaine into Britain.
Around three mules would be sent on each assignment, because the gang knew that if one was caught, they could still profit from the other two.
When officers raided the East Ham house, they found more than £1m worth of crack cocaine in pizza style pans in the kitchen - cut and ready for distribution to their customer network.
Detectives from the Met's Special Intelligence Section worked closely with officers from the French National Drugs Squad in Paris and the Drug Enforcement Agency in USA during a two-year investigation to smash the gang.
Another three people were convicted at previous hearings.