They have had to practice these subtle ingratiation tactics all their lives.

FORBES: Six Scientific Ways to Suck up Successfully

And all 6 aforementioned ingratiation tactics worked getting them.

FORBES: Six Scientific Ways to Suck up Successfully

Further, we need to recognize and navigate contentious tactics (ingratiation, shaming, blaming, threats, even violence).

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Those tactics include ingratiation, shaming, persuasive argumentation, threats (express or implied) and promises to take favorable action in the future if your desires are met today.

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Ithai and Jim examined these tactics constructing and using an elaborate database on 1822 top executives, measuring their ingratiation behavior (assessed through questionnaires) and various other variables.

FORBES: Six Scientific Ways to Suck up Successfully