In a world without Bond ...

Connery ...
... Dr. No would have died of radiation sickness
... Moscow would still be in love
... Federal gold reserves would be a kind of a mess
... Largo would have collected a ransom. Twice.

Lazenby ...
... Lord Blofeld rules the world

Moore ...
... Opioid crisis
... Scramanga would still top the rankings at the shooting range
... Submarine Stromberg town would have failed with or without him, Triple-X would be happily married
... Drax would poison us
... Russia would own an ancient British typewriter now
... Nukes at Ramstein airport, 10k+ tanks trying to go west, 4k really moving
... Zorin rules the chip market

Dalton:
... MI6 needs to recruit new agents
... A drug-lord survives

Brosnan ...
... Sean Bean survives a movie
... Carver gets broadcasting rights in China
... Radiated water at the Bosporus. Not worse than La Hague, still bad for tourism
... Same as in "Diamonds are Forever", but Korean

Craig ...
... Le Chiffre wins a poker match
... Water shortages in Bolivia
... New M is Ralph Fiennes
... Oberhauser continues doing his Oberhauser stuff, like sitting in dark conference rooms

Seems like Roger Moore's Bond made the biggest difference