Additonally there's "teamwork", with the same persons and roles mentioned above - only that some of the old group will try to throw out any new one in a minute, by mobbing, spreading false statements and generally contribute to a quick failure, of the project - it is "never their fault" though.
Teamwork means nowadays, that you can be such a dictator at first strike that you make all others shut up and respect your alpha personality - otherwise, no chance.
Greetings,
Catfish