▁The ▁more ▁benef icial ▁co operation ▁is , ▁the ▁more ▁forg iving ▁GT FT ▁can ▁be ▁while ▁still ▁resist ing ▁invasion ▁by ▁def ectors . ▁ ▁Even ▁when ▁partners ▁might ▁not ▁meet ▁again ▁it ▁could ▁be ▁strateg ically ▁wise ▁to ▁co oper ate . ▁When ▁people ▁can ▁select ively ▁choose ▁whom ▁to ▁interact ▁with ▁it ▁might ▁pay ▁to ▁be ▁seen ▁as ▁a ▁co operator . ▁Research ▁shows ▁that ▁co oper ators ▁create ▁better ▁opportun ities ▁for ▁themselves ▁than ▁non - co oper ators : ▁They ▁are ▁select ively ▁preferred ▁as ▁collabor ative ▁partners , ▁rom antic ▁partners , ▁and ▁group ▁leaders . ▁This ▁only ▁occurs ▁however ▁when ▁people ' s ▁social ▁d ile m ma ▁choices ▁are ▁monitor ed ▁by ▁others . ▁Public ▁acts ▁of ▁al tr u ism ▁and ▁co operation ▁like ▁char ity ▁giving , ▁phil anth ropy , ▁and ▁by stand er ▁inter vention ▁are ▁probably ▁manifest ations ▁of ▁reputation - based ▁co operation . ▁ ▁Struct ural ▁solutions ▁Struct ural ▁solutions ▁change ▁the ▁rules ▁of ▁the ▁game ▁either ▁through ▁modifying ▁the ▁social ▁d ile m ma ▁or ▁removing ▁the ▁d ile m ma ▁altogether . ▁Field ▁research ▁on ▁conservation ▁behaviour ▁has ▁shown ▁that ▁select ive ▁in cent ives ▁in ▁the ▁form ▁of ▁mon et ary ▁re wards ▁are ▁effective ▁in ▁decre asing ▁domestic ▁water ▁and ▁electric ity ▁use . ▁Furthermore , ▁numerous ▁experimental ▁and ▁case ▁studies ▁show ▁that ▁co operation ▁is ▁more ▁likely ▁based ▁on ▁a ▁number ▁of ▁factors , ▁including ▁whether ▁or ▁not ▁individuals ▁have ▁the ▁ability ▁to